Hello all. I've been lurking around for quite a while, but've never posted. But now I have a problem. So sad. I've just noticed a strange problem with the meter in my new (to me) Pentax KM. It seems to work fine, until you hit a half-second at ASA 400. Then the meter jumps way, way up, and not even blocking the lens will bring it back down. The behavior is proportional throughout the ASA range. At ASA 100, the meter jumps up at B. At 3200, 15. So I'm wondering, could it maaaybe just be a problem with the battery? I took the number listed in the manual to Radio Shack, and they gave me its modern-day equivalent. Could it be that? Please? I'd really hate for there to be something more serious wrong with it. It's probably not worth getting fixed, as it makes fine exposures otherwise and is pretty predictable. But it's one of those things, ya know?