>I am getting reports from my users that some frequently used screens
>are terribly slow when running on a newer Win 7/64 machine ...
>
>Less than a second on XP
>25 to 30 seconds on Win 7.
>
>This discrepancy is not universal, but seems to only occur (to that degree
>at least) on a few screens.
>
>Has anybody else experienced this? Is there some workaround?

Yes, I have noticed this. Check for nonexistent folders in the path.