I'm running Ubuntu 10.04 i686 in VirtualBox. I get this giant gap on my top toolbar and it's driving me nuts. Any way I can fix it?
Left of the up arrow there are 3 gray stripes under eachother. Drag them to the right and the icons will follow.
Rightclick and choose 'lock to panel' first otherwise it does not move.
edit: you are probably just aiming left or right of the 3 stripes.It is a rather narrow margin. Your popup shows up when you rightclick on an empty space on the panel.