Weird.. I have a Mac, and a while ago, whenever I viewed the oekaki boards, something would pop up saying that I should clean out my Mac. o-o
Also, I'm not sure if this means anything, but I recently got one like that from Squiby too, and when I tried to close it out, it said this word for word: "Are you sure you would like to close out? YOU SHOULD REALLY CLEAN OUT YOUR MAC!"
It stopped for me (on both sites), but it's weird that it's doing it to Windows now. o-o