I just purchased my 10v (previously ordered new) with 6 cell last week. I've only managed to get 10.5.7 fully functional two days ago (fixed the sound issue with the latest updates). All was well and I was happy.
Yesterday, however, I've noticed that the battery wouldn't charge, pretty much the first time I've used the 10v in osx. It was charging okay when I tested it in stock xp. What happens is that when the power adapter is plugged in, it shows "charged", no matter what state of charge the battery is in. When I unplug the adapter, it'll just show a red battery sign with ever decreasing battery power like 1 hour, 50 minutes, etc.
I haven't figured out yet how to get the battery charged (e.g. when the computer is shut off?) However I'd like to see if anyone else had suffered from similar problems, while I try out more things (remove battery, etc). Any tips and pointers are appreciated. The BIOS is the original A00 and I'm not sure how to upgrade it in OSX.