Well, the phone techs did a great job but the repair shop botched it the first two tries. Finally on the THIRD time I sent it in to them for this same problem, they replaced the motherboard and all appears to be well so far. I know they replaced it.. because it's back to A04 when I had updated the previous to A05 to see if that would fix it at all.
The battery and ac adapter I got to test with it, of course, showed the same problems before its second trip in ... during which time they... did nothing to the laptop, marked 'ac adaptor' on the 'corrective action taken', and shipped it back. Oddly enough, it wasn't shipped to them with an ac adapter AND it wasn't shipped back with one.
All together, I can guarantee the issue wasn't OS related as I reproduced it under...
Windows Vista (Ghost 11.5 WinPE)
and... the GRUB bootloader
First things to make sure of when checking up on it all, grab the A05 bios (not officially released last I saw, but even the phone techs pointed me to try it, there's a bootable usbkey image pre-built that makes updating to it a breeze). This specific problem won't likely be fixed, but 90% of the other battery/power related issues likely will.