The indexing ring was evidently gunked up and wouldn't turn. I could tell from the last couple rolls of film the meter also wasn't working properly. I sent it off for repairs and when I spoke with the technician he said he was having trouble getting the meter to work right. It was supposed to be fixed, and they sent it back to me.
The meter isn't working, so I've sent it back to them again. This is looking troubling to me. I've probably paid about what it would've cost to buy one 2nd hand, but I paid for the repair instead.
Have any of you had similar issues? I'm getting a bit nervous about this, and hoping I've not just spent money on something that's not going to be right for the long term.