When battery is 100%, power unplugging doesn't result in battery icon change - Fujitsu Amilo Pi3560

Hello,
sorry for bother, but I have to report this.

The problem is wrong battery status in specific circumstances on my laptop Fujitsu Amilo Pi3560.

When battery is fully charged and I unplug the power (or when I start system without power, but with full battery), then nothing happens and battery icon is showing "Fully charged" till battery is empty . Even if I click on power preferences, it shows 100% battery. The only way to find out that there is no power plugged, is battery light in my laptop (it turns red when battery is close to die). But Ubuntu doesn't know that at all, it still thinks that battery is 100%, even after 3 hours.

The problem is present in Ubuntu 12.04 but I did notice it also in the past in Ubuntu 10.04, 10.10, 11.04, 11.10.

Maybe it will be clearer if I write down what and when happens. Here comes the different scenarios:

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1. Battery is not fully charged

1.1. I turn my laptop on with plugged power

1.1.1. Icon is showing "charging" - that's OK
1.1.2. When I unplug the power, icon changes to "discharging", notify comes out - that's OK
1.1.3. When I plug the power back, icon changes to "charging", no notify - that's OK (though notify would be helpful)

1.2. I turn my laptop on with unplugged power

1.2.1. Icon is showing "discharging" - that's OK
1.2.2. When I plug the power, icon changes to "charging", no notify - that's OK

The problems starts here...

2. Battery is fully charged

2.1. I turn my laptop on with plugged power

2.1.1. Icon is showing "charged" - that's OK
2.1.2. When I uplug the power, nothing happens (no icon change, no notify) - that's NOT OK
2.1.3.1. When I plug the power back soon after 2.1.2., nothing happens (no icon change, no notify) - that's NOT OK
2.1.3.2. But when I plug the power back after some time (let the battery to discharge a little), icon changes to "discharging", notify comes out, but right after a second or two, icon changes to "charging", no notify - that's QUASI-OK (why "discharging" in the first place?!)

2.2. I turn my laptop on with unplugged power

2.2.1. Icon is showing "charged" - that's NOT OK
2.2.2. Wait some time, for instance 0.4h (let the battery to discharge a little)
2.2.3. When I plug the power, icon changes to "discharging", notify comes out, but right after a second or two, icon changes to "charging", no notify - that's QUASI-OK (why "discharging" in the first place?!)

------------------------

Just tell me if you need any other information. Also correct me if I did something wrong with reporting this bug. Thanks for reading :)

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: gnome-power-manager 2.32.0-2ubuntu2
ProcVersionSignature: Ubuntu 2.6.38-10.46-generic 2.6.38.7
Uname: Linux 2.6.38-10-generic x86_64
NonfreeKernelModules: nvidia
Architecture: amd64
Date: Thu Jun 30 23:22:38 2011
GnomeSessionIdleInhibited: No
GnomeSessionInhibitors: None
GnomeSessionSuspendInhibited: No
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Beta amd64 (20110413)
MachineType: FUJITSU AMILO Pi 3560
ProcEnviron:
 LANGUAGE=pl_PL:en
 LANG=pl_PL.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-10-generic root=UUID=f718c86c-a530-4a57-a0ac-ebcf153f9662 ro quiet splash vt.handoff=7
SourcePackage: gnome-power-manager
UpgradeStatus: Upgraded to natty on 2011-06-14 (16 days ago)
dmi.bios.date: 09/15/2009
dmi.bios.vendor: Phoenix
dmi.bios.version: 1.05
dmi.board.name: EF7A
dmi.board.vendor: FUJITSU
dmi.board.version: 01
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: FUJITSU
dmi.chassis.version: V30_
dmi.modalias: dmi:bvnPhoenix:bvr1.05:bd09/15/2009:svnFUJITSU:pnAMILOPi3560:pvrRev1.0:rvnFUJITSU:rnEF7A:rvr01:cvnFUJITSU:ct10:cvrV30_:
dmi.product.name: AMILO Pi 3560
dmi.product.version: Rev 1.0
dmi.sys.vendor: FUJITSU