Hi Pete,
Just installed latest drivers of Nvidia site for 8800GTS, Vista, 32 bit and results are the same. I would be interested to see if any other users with a similar setup to mine have had the same issue. I believe there is an update to Vista due soon.
As you might imagine it is a big job transferring all the payware stuff over from my old machine to this superdooper one. Your FSUIPC, Active Sky, Radar Contact, SSTSIM Concorde, etc etc.
The decision to go with Vista was not taken lightly and these problems were anticipated with the hope that eventually the problems would be addressed with updates and fixes. Saitek have just issued a beta fix for their X52Pro software for example. Time will tell.
Cheers
Peter