Every so often I get a .sit that has a generic icon, and when I try to unstuff, expander does nothing and then quits without so much as an error message. I assume they originate from PCs. Today I made myself a .sit from a PC, mailed it to myself, and when I collected it on my Mac, it was the same: Expander didn't want to play. Does anyone know about this issue or even better, how to solve it (preferably from the Mac end)? Thanks in advance.