Moved from Community Help to SecurityCenter for better attention.
Check the Blank Screen link in my signature below for a series of 5 solutions to the problem.
The first one usually fixes it instantly.
It's cause by something corrupting scripts and the fixes restore them.
Peter, I'm very pleased to report it worked this time!
I have run this before, when I first had the problem, but it didn't work then, for some reason. Well anyway, I am now a happy bunny once more, and a satisfied customer.
LOL, that's good. All the best ;-)