My taskbar is not set to autohide or anything, but when I enable desktop compositing, it disappears! The window doesn't move down or anything and if I hover over it, it reappears. It's quite crazy...
I have an ATI mobile video card... it's an ATI Radeon 2000 (or later) according to PCC.
Now about pidgin, it doesn't have an icon for the buddy list. I find this quite strange.. is anyone else experiencing this issue?