I have a high end DELL workstation (XP sp3), NVIDIA card (latest drivers) and 4 gigs ram. I use a lot of GUI intensive apps (camtasia, Cinema 4D, 3DVIA, PhotoShop, Illustrator, etc (frequently open at the same time)) (don't get me started on what HOG the CS4 suite is
) so I push the system pretty hard. It appears DF is the canary in the coal mine 'cuz it's the first to go south
A clue would be that first, it stops refreshing the button icons. Then, you can almost guarantee, when you open up the DF settings window the buttons themselves break to what seems to be generic XP buttons with no style applied to them at all.
I almost never see this bug anymore, so something's improving, but I think it's just better hidden, not fixed.
Anyway, as I say, it's rare now and I can live with it. I'd rather see Jon apply his efforts to the coming OS, not the fading one.