Horses will not spawn anywhere.
When holding any item on hand and hold right click to horse it will wheelie all time.
When go on horse in lan you vanish and you can't join lan again. internal exception: java.lang.Null.PointerExpection

{Client> 2013-04-21 18:07:12 [CLIENT] [INFO] Connecting to 192.168.1.2, 55420 Client> java.lang.NullPointerException Client> at ek.n(SourceFile:174) Client> at ck.a(SourceFile:237) Client> at ck.a(SourceFile:225) Client> at ck.h(SourceFile:175) Client> at ck.d(SourceFile:16) Client> at cm.run(SourceFile:115) Client> java.io.FileNotFoundException: http://assets.minecraft.net/1_6_has_been_released.flag Client> at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source) Client> at kq.a(SourceFile:237) Client> at bhq.run(SourceFile:114) Client> at java.lang.Thread.run(Unknown Source)}

If you log out on horse in land and back to game your horse double.