Today I've found out, that argouml starts fine on KDE. The windowmanager where it did _not_ work is IceWM. I haven't tried others. So it could also be an IceWM bug, though every other application starts fine. CCed IceWM maintainer, for original bug report see: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=353030 Best regards Ben