Yeah, it seems to do that when you input a value of 2147483648 or higher. (2^31 if I'm not mistaken)

Yes, I really did spend time figuring out the exact number.

EDIT: Hmmm, although now that I look at it, Mark, your number was lower than the number I discovered. Is that exactly what you entered? I don't think it's machine-specific because I tried it on both my computers and both act the same way (one computer is really high end, the other really low end)...hmmm, very strange.