Pruning the forum database.
"DOH" I spoke to soon, when I got up this morning the problem came back after rebooot :-(
Thanks UncleV and JohnW, that solved it. It reset the desktop to a "new install".
Did you check your LiveCD with "Media Check" option of the LiveCD itself?This would guarantee your .iso file is not corrupted and there are no read errors on your disk+drive.
OK, now this could be a coincidence but I was doing a backup and found 7gig of rubbish in my /home/rod/.tmp folder. Coincidence?Rod