Photoshop Help

I was messing around with a few images on the www.halo3.sc last night and messed one up

http://forums.halo3.sc/halo3source/misc/cattitle_bg.gif didn't save right and since I don't have photoshop on my mac I couldn't fix it.

I was wondering if someone could take a printscreen of the main forums and look at the different forum headers. You can see near the middle where the poorly saved image repeats. If you use a section of the good header and save it as cattitle_bg.gif with the same size that would be really great