Hi, I'm working with PS6. When I try to use any type of marquee selection tool, it makes the entire image completely black (and therefore useless, can't see any part of it).. like there's a black mask over everything. Toolbars still visible, and you can see the thumbnail of the image on the right bar, but not in the main screen. What's going on? My other versions of photoshop don't do this. Is this a bug? thanks.