I don't really know why. Maybe it has something to do with the ignore case? It seems to fix itself after I hit the alt key again. Right now I have the ignore case as 0 (false), although I'm not quite sure what it does. Maybe it has something to do with that and it's not a bug.
Also:
http://forums.graalonline.com/forums...ad.php?t=63842
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Now that I've had more time to look, it does have to do with the ignore case. When I set it to 1 it works after you take a screenshot.