I've stumbled over a strange problem: the panel flickers (and the CPU shots up to 100%) when the I pass the mouse over the border. The problem doesn't seem to been theme dependent, as I've been able to reproduce it in my system with over 6 themes. I'm using Debian unstable, gtk 2.8 and rox-desktop for Debian ( I've also tested with a fresh install of ROX). No other GTK app flickers ( not even rox-filer itself). Just the panel.
Is there anything I can do to track this bug ? Strace wasn't very helpful. I'd appreciate your input.