heya
Thx very much Data, your reply was great help. Yeah...well, I'd already uninstalled SL viewer and installed firestorm. I made sure I opened it using Nvidia graphics....all was/is good. As in the thread you gave me, I was being told I was using ATI Geforce Lulz. I'm now trying the project benchmark viewer.....as I prefer SL viewer to firestorm, less busy for my needs. Thank you again for taking the trouble