I've also noticed that if you save a file from any program under windows XP to drive A: (well maybe not any program but more likely IE or some other M$ program) then XP likes to keep tabs on that drive for some reason. Probably looking at the drive because it's in some "recently used" list or something, and as you know XP likes to have its fingers in everyone's pie.
The more I use WinUAE and AROS the more pukey windows seems lol
-Jamie