What? The apparently LaTeX-generated strings aren't even wiggled, embossed with some 3d kind of style, or anything. It can be probably really easy to transcribe it back to text and solve easily.
If they're trying to make their captcha as hard as possible to crack (and as hard as possible for others to actually solve it), they should have taken a cue from Rapidshare, with something like "For numbers with cats next to them, take the natural log of that number in place of the number itself."
The first time I saw this it actually was intended to get users to not sign up. It was some "you have to be this smart to join our club" type thing. A reverse captcha? One not worried about computers registering, but instead trying to filter actual users out?
Oh, and I've gotten that Rapidshare thing a few times. It seriously confused the hell out of me. It looked like all the numbers had cats on them, but it only let me type (less than the amount of characters). Do the other letters have dogs on them or something?
If they're trying to make their captcha as hard as possible to crack (and as hard as possible for others to actually solve it), they should have taken a cue from Rapidshare, with something like "For numbers with cats next to them, take the natural log of that number in place of the number itself."