[Deque]

@noize:
I tried on Windows 7 now and got these issues:
The framerate jumped to 800 fps which is way too much. (with Linux I always get 60-65 fps)
The lags after dropping items on the character appeared too.
The game took a long time to start.

I updated to the newest lwjgl version, but it didn't change anything.
I will see if limiting the framerate helps or if I can fix it in any other way.