Thanks tkdlady
Just an update, I also have some issues at gamemoviemaking.com and thought I'd try overwriting that install with files from a site that I know to be working correctly. In the process I completely mucked up the database and managed to miss the main problem so I guess that ideas out.
I fear all these sites will have to be upgraded one level on the db, then re-built and populated with portions of the database and then finally have the forums upgraded to the most current version.
Loox like the work has just begun :?