Sometimes, mostly after a background image change (my
background picture changes each 10 minutes), the panel
flickers for some time. It looks like it's being
painted and repainted, and sometimes stops after some time.
I have a complex setup here, and that might be the
cause of the problem:
My desktop is a custom one. It's a mix of ROX, sawfish
and gnome. More precisely, what happens is that
"rox-session" (a session manager) starts all the
applications, starting with the ROX-Filer itself, which
paints the background using the Wallpaper application,
starts sawfish and gnome-panel. I have a few other
things configured, namely gkrellm and sawfish-pager,
but I don't think those should affect the problem.
The ROX desktop: http://rox.sf.net/
Gnome-panel: http://gnome.org/ :)
In the same conditions, gnome-panel doesn't flicker,
for what it's worth.
I'm available for further debugging.