When i launch Minecraft 1.8 this happens: (Look at the screenshot.) And it only happens with 1.8. Here is the launcher log, It doesn't create a crash report.

[12:49:15 INFO]: Minecraft Launcher 1.5.3 (through bootstrap 4) started on windows...
[12:49:15 INFO]: Current time is Sep 6, 2014 12:49:15 PM
[12:49:15 INFO]: System.getProperty('os.name') == 'Windows 7'
[12:49:15 INFO]: System.getProperty('os.version') == '6.1'
[12:49:15 INFO]: System.getProperty('os.arch') == 'amd64'
[12:49:15 INFO]: System.getProperty('java.version') == '1.7.0_55'
[12:49:15 INFO]: System.getProperty('java.vendor') == 'Oracle Corporation'
[12:49:15 INFO]: System.getProperty('sun.arch.data.model') == '64'
[12:49:15 INFO]: JFX has been detected & successfully loaded
[12:49:15 INFO]: Refreshing local version list...
[12:49:15 INFO]: Refreshing remote version list...
[12:49:16 INFO]: Refresh complete.
[12:49:16 INFO]: Loaded 6 profile(s); selected 'romtec123'
[12:49:16 INFO]: Refreshing auth...
[12:49:16 INFO]: Logging in with access token
[12:53:34 INFO]: Getting syncinfo for selected version
[12:53:34 INFO]: Queueing library & version downloads
[12:53:34 INFO]: Download job 'Version & Libraries' started (16 threads, 33 files)
[12:53:34 INFO]: Attempting to download C:\Users\Julian\AppData\Roaming\.minecraft\libraries\org\apache\logging\log4j\log4j-api\2.0-beta9\log4j-api-2.0-beta9.jar for job 'Version & Libraries'... (try 0)
[12:53:34 INFO]: Attempting to download C:\Users\Julian\AppData\Roaming\.minecraft\libraries\net\sf\trove4j\trove4j\3.0.3\trove4j-3.0.3.jar for job 'Version & Libraries'... (try 0)
[12:53:34 INFO]: Attempting to download C:\Users\Julian\AppData\Roaming\.minecraft\libraries\com\ibm\icu\icu4j-core-mojang\51.2\icu4j-core-mojang-51.2.jar for job 'Version & Libraries'... (try 0)
[12:53:34 INFO]: Attempting to download C:\Users\Julian\AppData\Roaming\.minecraft\libraries\net\java\jutils\jutils\1.0.0\jutils-1.0.0.jar for job 'Version & Libraries'... (try 0)
[12:53:34 INFO]: Attempting to download C:\Users\Julian\AppData\Roaming\.minecraft\libraries\commons-logging\commons-logging\1.1.3\commons-logging-1.1.3.jar for job 'Version & Libraries'... (try 0)
[12:53:34 INFO]: Attempting to download C:\Users\Julian\AppData\Roaming\.minecraft\libraries\com\paulscode\libraryjavasound\20101123\libraryjavasound-20101123.jar for job 'Version & Libraries'... (try 0)
[12:53:34 INFO]: Attempting to download C:\Users\Julian\AppData\Roaming\.minecraft\libraries\com\google\code\gson\gson\2.2.4\gson-2.2.4.jar for job 'Version & Libraries'... (try 0)
[12:53:34 INFO]: Attempting to download C:\Users\Julian\AppData\Roaming\.minecraft\libraries\com\paulscode\codecjorbis\20101023\codecjorbis-20101023.jar for job 'Version & Libraries'... (try 0)
[12:53:34 INFO]: Attempting to download C:\Users\Julian\AppData\Roaming\.minecraft\libraries\org\apache\httpcomponents\httpcore\4.3.2\httpcore-4.3.2.jar for job 'Version & Libraries'... (try 0)
[12:53:34 INFO]: Attempting to download C:\Users\Julian\AppData\Roaming\.minecraft\libraries\com\google\guava\guava\17.0\guava-17.0.jar for job 'Version & Libraries'... (try 0)
[12:53:34 INFO]: Attempting to download C:\Users\Julian\AppData\Roaming\.minecraft\libraries\com\paulscode\librarylwjglopenal\20100824\librarylwjglopenal-20100824.jar for job 'Version & Libraries'... (try 0)
[12:53:34 INFO]: Attempting to download C:\Users\Julian\AppData\Roaming\.minecraft\libraries\com\mojang\authlib\1.5.17\authlib-1.5.17.jar for job 'Version & Libraries'... (try 0)
[12:53:34 INFO]: Attempting to download C:\Users\Julian\AppData\Roaming\.minecraft\libraries\commons-codec\commons-codec\1.9\commons-codec-1.9.jar for job 'Version & Libraries'... (try 0)
[12:53:34 INFO]: Attempting to download C:\Users\Julian\AppData\Roaming\.minecraft\libraries\tv\twitch\twitch-platform\6.5\twitch-platform-6.5-natives-windows-64.jar for job 'Version & Libraries'... (try 0)
[12:53:34 INFO]: Attempting to download C:\Users\Julian\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl\2.9.1\lwjgl-2.9.1.jar for job 'Version & Libraries'... (try 0)
[12:53:34 INFO]: Attempting to download C:\Users\Julian\AppData\Roaming\.minecraft\libraries\org\apache\commons\commons-compress\1.8.1\commons-compress-1.8.1.jar for job 'Version & Libraries'... (try 0)
[12:53:35 INFO]: Download job 'Resources' skipped as there are no files to download
[12:53:35 INFO]: Job 'Resources' finished successfully (took 0:00:00.000)
[12:53:35 INFO]: Finished downloading C:\Users\Julian\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl\2.9.1\lwjgl-2.9.1.jar for job 'Version & Libraries': Local file matches local checksum, using that
[12:53:35 INFO]: Finished downloading C:\Users\Julian\AppData\Roaming\.minecraft\libraries\org\apache\commons\commons-compress\1.8.1\commons-compress-1.8.1.jar for job 'Version & Libraries': Local file matches local checksum, using that
[12:53:35 INFO]: Finished downloading C:\Users\Julian\AppData\Roaming\.minecraft\libraries\tv\twitch\twitch-platform\6.5\twitch-platform-6.5-natives-windows-64.jar for job 'Version & Libraries': Local file matches local checksum, using that
[12:53:35 INFO]: Attempting to download C:\Users\Julian\AppData\Roaming\.minecraft\libraries\org\apache\logging\log4j\log4j-core\2.0-beta9\log4j-core-2.0-beta9.jar for job 'Version & Libraries'... (try 0)
[12:53:35 INFO]: Finished downloading C:\Users\Julian\AppData\Roaming\.minecraft\libraries\commons-codec\commons-codec\1.9\commons-codec-1.9.jar for job 'Version & Libraries': Local file matches local checksum, using that
[12:53:35 INFO]: Attempting to download C:\Users\Julian\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl-platform\2.9.1\lwjgl-platform-2.9.1-natives-windows.jar for job 'Version & Libraries'... (try 0)
[12:53:35 INFO]: Attempting to download C:\Users\Julian\AppData\Roaming\.minecraft\libraries\com\paulscode\soundsystem\20120107\soundsystem-20120107.jar for job 'Version & Libraries'... (try 0)
[12:53:35 INFO]: Attempting to download C:\Users\Julian\AppData\Roaming\.minecraft\libraries\com\mojang\realms\1.5.4\realms-1.5.4.jar for job 'Version & Libraries'... (try 0)
[12:53:35 INFO]: Finished downloading C:\Users\Julian\AppData\Roaming\.minecraft\libraries\com\mojang\realms\1.5.4\realms-1.5.4.jar for job 'Version & Libraries': Local file matches local checksum, using that
[12:53:35 INFO]: Attempting to download C:\Users\Julian\AppData\Roaming\.minecraft\libraries\org\apache\httpcomponents\httpclient\4.3.3\httpclient-4.3.3.jar for job 'Version & Libraries'... (try 0)
[12:53:35 INFO]: Finished downloading C:\Users\Julian\AppData\Roaming\.minecraft\libraries\com\mojang\authlib\1.5.17\authlib-1.5.17.jar for job 'Version & Libraries': Local file matches local checksum, using that
[12:53:35 INFO]: Attempting to download C:\Users\Julian\AppData\Roaming\.minecraft\libraries\net\java\jinput\jinput-platform\2.0.5\jinput-platform-2.0.5-natives-windows.jar for job 'Version & Libraries'... (try 0)
[12:53:35 INFO]: Finished downloading C:\Users\Julian\AppData\Roaming\.minecraft\libraries\com\paulscode\librarylwjglopenal\20100824\librarylwjglopenal-20100824.jar for job 'Version & Libraries': Local file matches local checksum, using that
[12:53:35 INFO]: Attempting to download C:\Users\Julian\AppData\Roaming\.minecraft\libraries\net\java\jinput\jinput\2.0.5\jinput-2.0.5.jar for job 'Version & Libraries'... (try 0)
[12:53:35 INFO]: Finished downloading C:\Users\Julian\AppData\Roaming\.minecraft\libraries\com\paulscode\soundsystem\20120107\soundsystem-20120107.jar for job 'Version & Libraries': Local file matches local checksum, using that
[12:53:35 INFO]: Attempting to download C:\Users\Julian\AppData\Roaming\.minecraft\libraries\io\netty\netty-all\4.0.15.Final\netty-all-4.0.15.Final.jar for job 'Version & Libraries'... (try 0)
[12:53:35 INFO]: Finished downloading C:\Users\Julian\AppData\Roaming\.minecraft\libraries\net\java\jinput\jinput-platform\2.0.5\jinput-platform-2.0.5-natives-windows.jar for job 'Version & Libraries': Local file matches local checksum, using that
[12:53:35 INFO]: Attempting to download C:\Users\Julian\AppData\Roaming\.minecraft\libraries\com\paulscode\codecwav\20101023\codecwav-20101023.jar for job 'Version & Libraries'... (try 0)
[12:53:35 INFO]: Finished downloading C:\Users\Julian\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl-platform\2.9.1\lwjgl-platform-2.9.1-natives-windows.jar for job 'Version & Libraries': Local file matches local checksum, using that
[12:53:35 INFO]: Finished downloading C:\Users\Julian\AppData\Roaming\.minecraft\libraries\net\java\jinput\jinput\2.0.5\jinput-2.0.5.jar for job 'Version & Libraries': Local file matches local checksum, using that
[12:53:35 INFO]: Attempting to download C:\Users\Julian\AppData\Roaming\.minecraft\libraries\tv\twitch\twitch\6.5\twitch-6.5.jar for job 'Version & Libraries'... (try 0)
[12:53:35 INFO]: Attempting to download C:\Users\Julian\AppData\Roaming\.minecraft\libraries\java3d\vecmath\1.5.2\vecmath-1.5.2.jar for job 'Version & Libraries'... (try 0)
[12:53:35 INFO]: Finished downloading C:\Users\Julian\AppData\Roaming\.minecraft\libraries\com\paulscode\codecwav\20101023\codecwav-20101023.jar for job 'Version & Libraries': Local file matches local checksum, using that
[12:53:35 INFO]: Attempting to download C:\Users\Julian\AppData\Roaming\.minecraft\libraries\commons-io\commons-io\2.4\commons-io-2.4.jar for job 'Version & Libraries'... (try 0)
[12:53:35 INFO]: Finished downloading C:\Users\Julian\AppData\Roaming\.minecraft\libraries\java3d\vecmath\1.5.2\vecmath-1.5.2.jar for job 'Version & Libraries': Local file matches local checksum, using that
[12:53:35 INFO]: Attempting to download C:\Users\Julian\AppData\Roaming\.minecraft\libraries\org\apache\commons\commons-lang3\3.3.2\commons-lang3-3.3.2.jar for job 'Version & Libraries'... (try 0)
[12:53:35 INFO]: Finished downloading C:\Users\Julian\AppData\Roaming\.minecraft\libraries\commons-io\commons-io\2.4\commons-io-2.4.jar for job 'Version & Libraries': Local file matches local checksum, using that
[12:53:35 INFO]: Attempting to download C:\Users\Julian\AppData\Roaming\.minecraft\libraries\net\sf\jopt-simple\jopt-simple\4.6\jopt-simple-4.6.jar for job 'Version & Libraries'... (try 0)
[12:53:35 INFO]: Finished downloading C:\Users\Julian\AppData\Roaming\.minecraft\libraries\net\sf\jopt-simple\jopt-simple\4.6\jopt-simple-4.6.jar for job 'Version & Libraries': Local file matches local checksum, using that
[12:53:35 INFO]: Attempting to download C:\Users\Julian\AppData\Roaming\.minecraft\libraries\tv\twitch\twitch-external-platform\4.5\twitch-external-platform-4.5-natives-windows-64.jar for job 'Version & Libraries'... (try 0)
[12:53:35 INFO]: Finished downloading C:\Users\Julian\AppData\Roaming\.minecraft\libraries\org\apache\commons\commons-lang3\3.3.2\commons-lang3-3.3.2.jar for job 'Version & Libraries': Local file matches local checksum, using that
[12:53:35 INFO]: Attempting to download C:\Users\Julian\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl_util\2.9.1\lwjgl_util-2.9.1.jar for job 'Version & Libraries'... (try 0)
[12:53:35 INFO]: Finished downloading C:\Users\Julian\AppData\Roaming\.minecraft\libraries\tv\twitch\twitch\6.5\twitch-6.5.jar for job 'Version & Libraries': Local file matches local checksum, using that
[12:53:35 INFO]: Attempting to download C:\Users\Julian\AppData\Roaming\.minecraft\versions\1.8\1.8.jar for job 'Version & Libraries'... (try 0)
[12:53:35 INFO]: Finished downloading C:\Users\Julian\AppData\Roaming\.minecraft\libraries\com\google\guava\guava\17.0\guava-17.0.jar for job 'Version & Libraries': Local file matches local checksum, using that
[12:53:35 INFO]: Finished downloading C:\Users\Julian\AppData\Roaming\.minecraft\libraries\org\apache\httpcomponents\httpcore\4.3.2\httpcore-4.3.2.jar for job 'Version & Libraries': Local file matches local checksum, using that
[12:53:35 INFO]: Finished downloading C:\Users\Julian\AppData\Roaming\.minecraft\libraries\com\ibm\icu\icu4j-core-mojang\51.2\icu4j-core-mojang-51.2.jar for job 'Version & Libraries': Local file matches local checksum, using that
[12:53:35 INFO]: Finished downloading C:\Users\Julian\AppData\Roaming\.minecraft\libraries\com\paulscode\codecjorbis\20101023\codecjorbis-20101023.jar for job 'Version & Libraries': Local file matches local checksum, using that
[12:53:35 INFO]: Finished downloading C:\Users\Julian\AppData\Roaming\.minecraft\libraries\com\google\code\gson\gson\2.2.4\gson-2.2.4.jar for job 'Version & Libraries': Local file matches local checksum, using that
[12:53:35 INFO]: Finished downloading C:\Users\Julian\AppData\Roaming\.minecraft\libraries\com\paulscode\libraryjavasound\20101123\libraryjavasound-20101123.jar for job 'Version & Libraries': Local file matches local checksum, using that
[12:53:35 INFO]: Finished downloading C:\Users\Julian\AppData\Roaming\.minecraft\libraries\commons-logging\commons-logging\1.1.3\commons-logging-1.1.3.jar for job 'Version & Libraries': Local file matches local checksum, using that
[12:53:35 INFO]: Finished downloading C:\Users\Julian\AppData\Roaming\.minecraft\libraries\net\java\jutils\jutils\1.0.0\jutils-1.0.0.jar for job 'Version & Libraries': Local file matches local checksum, using that
[12:53:35 INFO]: Finished downloading C:\Users\Julian\AppData\Roaming\.minecraft\libraries\net\sf\trove4j\trove4j\3.0.3\trove4j-3.0.3.jar for job 'Version & Libraries': Local file matches local checksum, using that
[12:53:35 INFO]: Finished downloading C:\Users\Julian\AppData\Roaming\.minecraft\libraries\io\netty\netty-all\4.0.15.Final\netty-all-4.0.15.Final.jar for job 'Version & Libraries': Local file matches local checksum, using that
[12:53:35 INFO]: Finished downloading C:\Users\Julian\AppData\Roaming\.minecraft\libraries\org\apache\logging\log4j\log4j-api\2.0-beta9\log4j-api-2.0-beta9.jar for job 'Version & Libraries': Local file matches local checksum, using that
[12:53:35 INFO]: Finished downloading C:\Users\Julian\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl_util\2.9.1\lwjgl_util-2.9.1.jar for job 'Version & Libraries': Local file matches local checksum, using that
[12:53:35 INFO]: Finished downloading C:\Users\Julian\AppData\Roaming\.minecraft\libraries\org\apache\httpcomponents\httpclient\4.3.3\httpclient-4.3.3.jar for job 'Version & Libraries': Local file matches local checksum, using that
[12:53:35 INFO]: Finished downloading C:\Users\Julian\AppData\Roaming\.minecraft\libraries\org\apache\logging\log4j\log4j-core\2.0-beta9\log4j-core-2.0-beta9.jar for job 'Version & Libraries': Local file matches local checksum, using that
[12:53:35 INFO]: Finished downloading C:\Users\Julian\AppData\Roaming\.minecraft\libraries\tv\twitch\twitch-external-platform\4.5\twitch-external-platform-4.5-natives-windows-64.jar for job 'Version & Libraries': Local file matches local checksum, using that
[12:53:35 INFO]: Finished downloading C:\Users\Julian\AppData\Roaming\.minecraft\versions\1.8\1.8.jar for job 'Version & Libraries': Used own copy as it matched etag
[12:53:35 INFO]: Job 'Version & Libraries' finished successfully (took 0:00:00.813)
[12:53:35 INFO]: Launching game
[12:53:35 INFO]: Unpacking natives to C:\Users\Julian\AppData\Roaming\.minecraft\versions\1.8\1.8-natives-1402453014953650
[12:53:36 INFO]: Launching in C:\Users\Julian\AppData\Roaming\.minecraft
[12:53:36 INFO]: Half command: C:\Program Files\Java\jre7\bin\javaw.exe -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx4G -Djava.library.path=C:\Users\Julian\AppData\Roaming\.minecraft\versions\1.8\1.8-natives-1402453014953650 -cp C:\Users\Julian\AppData\Roaming\.minecraft\libraries\java3d\vecmath\1.5.2\vecmath-1.5.2.jar;C:\Users\Julian\AppData\Roaming\.minecraft\libraries\net\sf\trove4j\trove4j\3.0.3\trove4j-3.0.3.jar;C:\Users\Julian\AppData\Roaming\.minecraft\libraries\com\ibm\icu\icu4j-core-mojang\51.2\icu4j-core-mojang-51.2.jar;C:\Users\Julian\AppData\Roaming\.minecraft\libraries\net\sf\jopt-simple\jopt-simple\4.6\jopt-simple-4.6.jar;C:\Users\Julian\AppData\Roaming\.minecraft\libraries\com\paulscode\codecjorbis\20101023\codecjorbis-20101023.jar;C:\Users\Julian\AppData\Roaming\.minecraft\libraries\com\paulscode\codecwav\20101023\codecwav-20101023.jar;C:\Users\Julian\AppData\Roaming\.minecraft\libraries\com\paulscode\libraryjavasound\20101123\libraryjavasound-20101123.jar;C:\Users\Julian\AppData\Roaming\.minecraft\libraries\com\paulscode\librarylwjglopenal\20100824\librarylwjglopenal-20100824.jar;C:\Users\Julian\AppData\Roaming\.minecraft\libraries\com\paulscode\soundsystem\20120107\soundsystem-20120107.jar;C:\Users\Julian\AppData\Roaming\.minecraft\libraries\io\netty\netty-all\4.0.15.Final\netty-all-4.0.15.Final.jar;C:\Users\Julian\AppData\Roaming\.minecraft\libraries\com\google\guava\guava\17.0\guava-17.0.jar;C:\Users\Julian\AppData\Roaming\.minecraft\libraries\org\apache\commons\commons-lang3\3.3.2\commons-lang3-3.3.2.jar;C:\Users\Julian\AppData\Roaming\.minecraft\libraries\commons-io\commons-io\2.4\commons-io-2.4.jar;C:\Users\Julian\AppData\Roaming\.minecraft\libraries\commons-codec\commons-codec\1.9\commons-codec-1.9.jar;C:\Users\Julian\AppData\Roaming\.minecraft\libraries\net\java\jinput\jinput\2.0.5\jinput-2.0.5.jar;C:\Users\Julian\AppData\Roaming\.minecraft\libraries\net\java\jutils\jutils\1.0.0\jutils-1.0.0.jar;C:\Users\Julian\AppData\Roaming\.minecraft\libraries\com\google\code\gson\gson\2.2.4\gson-2.2.4.jar;C:\Users\Julian\AppData\Roaming\.minecraft\libraries\com\mojang\authlib\1.5.17\authlib-1.5.17.jar;C:\Users\Julian\AppData\Roaming\.minecraft\libraries\com\mojang\realms\1.5.4\realms-1.5.4.jar;C:\Users\Julian\AppData\Roaming\.minecraft\libraries\org\apache\commons\commons-compress\1.8.1\commons-compress-1.8.1.jar;C:\Users\Julian\AppData\Roaming\.minecraft\libraries\org\apache\httpcomponents\httpclient\4.3.3\httpclient-4.3.3.jar;C:\Users\Julian\AppData\Roaming\.minecraft\libraries\commons-logging\commons-logging\1.1.3\commons-logging-1.1.3.jar;C:\Users\Julian\AppData\Roaming\.minecraft\libraries\org\apache\httpcomponents\httpcore\4.3.2\httpcore-4.3.2.jar;C:\Users\Julian\AppData\Roaming\.minecraft\libraries\org\apache\logging\log4j\log4j-api\2.0-beta9\log4j-api-2.0-beta9.jar;C:\Users\Julian\AppData\Roaming\.minecraft\libraries\org\apache\logging\log4j\log4j-core\2.0-beta9\log4j-core-2.0-beta9.jar;C:\Users\Julian\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl\2.9.1\lwjgl-2.9.1.jar;C:\Users\Julian\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl_util\2.9.1\lwjgl_util-2.9.1.jar;C:\Users\Julian\AppData\Roaming\.minecraft\libraries\tv\twitch\twitch\6.5\twitch-6.5.jar;C:\Users\Julian\AppData\Roaming\.minecraft\versions\1.8\1.8.jar net.minecraft.client.main.Main
[12:53:36 INFO]: Looking for orphaned versions to clean up...

[12:53:36 INFO]: Deleted empty directory C:\Users\Julian\AppData\Roaming\.minecraft\assets\objects\e4
[12:53:37 INFO]: Looking for old natives & assets to clean up...
[12:54:40 ERROR]: Game ended with bad state (exit code 255)
[12:54:40 INFO]: Ignoring visibility rule and showing launcher due to a game crash
[12:54:40 INFO]: Deleting C:\Users\Julian\AppData\Roaming\.minecraft\versions\1.8\1.8-natives-1402453014953650
[12:54:40 WARN]: Couldn't delete C:\Users\Julian\AppData\Roaming\.minecraft\versions\1.8\1.8-natives-1402453014953650 - scheduling for deletion upon exit

It cleaned up a bunch of "orphan objects", but i deleted them beacuse it was using too many characters.