I'll have a go tomorrow, got to go to bed. 1AM don't ya know
I'll post back tomorrow.
Thanks ever so much
--------------- Added at 22:55 ---------------
Thanks for all your help, your support helped nudge me in the right direction and the problem (well, the current one

) is solved.
The problem was the sql backup. Flashchat had been installed after we had setup the backup job in mysql administrator. The backup job didn't include the tables for flashchat. Simple as that!
One fresh, modified, backup and restore and up came the homepage...
Thanks again.