I did as you suggested.
Rsynced /home/user/.kde4/share to a local folder.
I also dragged and dropped the share folder to a second local folder.(for safety) I then deleted .kde4.
I then rebooted....
Black screen and home folder only, no task bar at all.
I then logged in as root, deleted me and the recreated me.
A normal screen and task bar.
Rsynced share from the local folder. ran kontact and lo... no inbox.
still no inbox but the system was back as not normal as well, back to square 1.
The problem appears to be in the share folder.
Any idea as to what in there, can cause this problem?
As always, your thoughts gratefully received.