1. Start compiz. 2. Use Vinagre to connect a remote desktop in full screen mode. 3. Move mouse to top of the screen. 4. The bar does not show up.
This bug appears to have been reported against 'rawhide' during the Fedora 13 development cycle. Changing version to '13'. More information and reason for this action is here: http://fedoraproject.org/wiki/BugZappers/HouseKeeping
The same happens with vinagre-2.31.4-1.fc14.x86_64
As near as I can tell, this is a side effect of compiz' edge shortcut support. Compiz receives the mouse movements and clicks when the mouse enters the top-center portion of the screen, and that makes the vinagre bar inaccessible. (Remmina/grdc has the same problem when compiz is running)
Works for me in Fedora 15
Works with GNOME3, let's close.