I have been playing with a friend on his realm for a few months now. While in the Nether we found a fortress and while fighting a good number of Blaze we both died. He is still able to log in with now issues. When I try to log in it will now go through the whole loading process and then right after I see "Done!" I hear about one second of the Nether and then the program crashes and closes. I have not been able to log in for a few days now. We have taken the server up and back down and tried everything we can think of to fix it with no luck. This is only one of the problems we have found. Another is some areas of the map can not be mapped. If you go to that area and open a blank map the server will boot you, reset back a few minutes and then come back up. Same with trying to dye sheep, some colors will crash the server as well. Please help.