I've just noticed that the following filters in CS5's filter panel are grayed out, and therefore not accessible: Filter Gallery; Artistic; Brush Strokes; Distort; Pixelate; Sketch; Texture; Digimarc.
I know that I have used some of these in the past, and have no idea when or how they came to be grayed out. I know there has to be a logical answer for this - some setting or something I can change to bring them back - but I don't know how to think like an algorithmist. Any ideas? Thanks a lot.
Lon