I decided to submit a bug report as I am fed up of this happening..
Linux 2.6.38-2.dmz.2-liquorix-amd64 [x86_64/2.29GHz/SMP]
Charset: UTF-8 Renderer: Pango
Compiled: Jul 24 2010
So I have Xchat iconified up on the panel. Now I either have suspended the machine, or something has made the panel restart. But it leaves the process intact, however, I have no way of getting the window back up.
Having to kill the process and restarting is pointless, because then I have to start all over again with some windows. :(
You will see what I mean with included screeniegrabby.