>I was referring to Windows patches actually. If this were VFP9SP2 then I'd suspect the refresh or something like that, but this is VFP8SP1.

I didn't hear about any Windows updates that could cause form modality problems.

>Actually that's an interesting point: is the latest VFP9 more Vista-compatible than my current environment ?

SP2 seems to address Vista compatibilty issues but introduced some new bugs. For example, Serious bug with Data Groups introduced in VFP 9 SP2 Thread #1269108