The issue I ran into is that in my Linux XFCE Sun java 6 environment
Jitsi (both 2.2 and Git HEAD) start up using the Java metal theme,
despite the availability of the GTK+ look and feel.
From a look at the code my impression is that the responsible developer
thought of KDE but not of GTK-based environments. The attached patch
against Git HEAD works well for me, please consider application.