Programs loading but sitting in limbo whilst not displaying

[Warren Liddell]

Im running FreeBSD 7.1-STABLE AMD64 KDE4.1.4 and recently for no reason i can 
think of when i try and load FireFox or Thunderbird, according to my process 
list, the applications are running, but yet they dont ever show up in KDE to 
use//liaise with.  I have even started them from command line but again, 
nothing, it just sits there, no error msg, but process list again, sais there 
running.  

I have tried recompiling both ports with no success and im runnin gout of 
theorys as to whats happening.

Any ideas/thoughts welcomed.