When using panel manager, remove one of the panels and they all disappear. The panel manager then fails to open. Rebooting does not resolve the issue. The only way I was able to start the panels again was to run "xfce4-panel". Here is a link to another page that had the same issue. https://lists.ubuntu.com/archives/ubuntu-users/2006-January/065765.html
Created attachment 1428 xfce4-panel catchsegv text I have this same issue. Fedora 8 The xfce4-panel program seg faults when you remove one panel. You could have 2, 3, or 4 panels and when you remove one panel it seg faults.
*** This bug has been marked as a duplicate of bug 3496 ***