>>>I have VFP 5.0 running on Dell Dimension 450 Mhz with Windows NT. Everything works fine.
>>
>>Thanks for the info...so it's certainly not speed alone causing the problem...
>
>G'day Bruce,
>My partner just got a new fast computer. Couldn't click on Project tags. Turned out to be the super-you-beaut Diamond Viper video card.

Don't tell me - it was a Viper V550...

I've had problem intermittently with both that and the STB Velocity 4000, both based on the nVidia Riva TNT chipset. I'm using the AT and matrox cards now, with much more stable results, at a slight expense in frame rate under Quake II and Unforgiven.