Thanks! I went into the menu and turned off RAW. Interestingly, before I did that, I looked at the files on my PC and they were the same size as usual and listed as JPG's, so I assumed I wasn't writing to RAW. So I don't fully understand how just having that option on slowed down my camera. But turning it off returned my speed to normal, so that was clearly it! Thanks for your help!
p.s. I LOVE having a battery indicator now! That was one of the primary reasons I installed CHDK. That and the much easier manual focus now with the zoom.
