battery estimates swing wildly, often forcing unneeded suspend

since fix for bug #629258 was applied, I now get battery estimates, but they fluctuate wildly.

most problematic instance being when it estimates 1 minute remaining for 99% battery life, and immediately suspends after unplugging the machine. Doesn't always happen, but rather large problem when it does.

this on an HP envy 15 (with relatively poor battery life, but not 1 minute = 99% poor)

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: upower 0.9.12-1
ProcVersionSignature: Ubuntu 3.0.0-9.14-generic 3.0.3
Uname: Linux 3.0.0-9-generic x86_64
Architecture: amd64
Date: Thu Sep 1 12:07:27 2011
InstallationMedia: Ubuntu 10.04 "Lucid Lynx" - Release Candidate amd64 (20100419.1)
ProcEnviron:
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: upower
UpgradeStatus: Upgraded to oneiric on 2011-07-13 (49 days ago)