Using Ubuntu 12.10
Java: OpenJDK 7
Launcher: 0.3.1
Just saw few error messages maybe you need to know them it happens every time I open the louncher :) everything works right:
http://pastebin.com/CmSkLEm4
also a suggestion:
well LWJGL 2.4.2 is buggy on linux would be cool if in launcher would...