Firefox under KDE changes the mouse cursor

[Uqbar]

I run Firefox under KDE with the GTK+ bridge configured to use the same theme as KDE (QTCurve).
Firefox shows the "normal" mouse cursor while hovering on the application window.
As soon as I open the firefox main menu, the mouse cursor changes shape, it becomes smaller while still keeping the same theme as before.
It's impossible to capture such a bug with the screenshot tool.
I would expect the mouse pointer to keep it's shape/color/size all the time.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: firefox 15.0.1+build1-0ubuntu0.12.04.1
ProcVersionSignature: Ubuntu 3.2.0-23.36-generic 3.2.14
Uname: Linux 3.2.0-23-generic x86_64
AddonCompatCheckDisabled: False
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 2.0.1-0ubuntu13
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: enzo 2797 F.... pulseaudio
 /dev/snd/controlC0: enzo 2797 F.... pulseaudio
BuildID: 20120907231657
CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found.
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xf9df8000 irq 79'
   Mixer name : 'Realtek ALC889'
   Components : 'HDA:10ec0889,104383c0,00100004'
   Controls : 44
   Simple ctrls : 22
Card1.Amixer.info:
 Card hw:1 'NVidia'/'HDA NVidia at 0xfbcfc000 irq 34'
   Mixer name : 'Nvidia GPU 0b HDMI/DP'
   Components : 'HDA:10de000b,10de0101,00100200'
   Controls : 24
   Simple ctrls : 4
Channel: Unavailable
Date: Thu Sep 27 18:09:18 2012
ForcedLayersAccel: False
InstallationMedia: Kubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120424)
IpRoute:
 default via 192.168.254.254 dev eth0 proto static
 169.254.0.0/16 dev eth0 scope link metric 1000
 192.168.254.0/24 dev eth0 proto kernel scope link src 192.168.254.42 metric 1
IwConfig:
 lo no wireless extensions.

 eth0 no wireless extensions.
Plugins:
 Google Talk Plugin Video Accelerator - /opt/google/talkplugin/libnpgtpo3dautoplugin.so (google-talkplugin)
 Google Talk Plugin - /opt/google/talkplugin/libnpgoogletalk.so (google-talkplugin)
 IcedTea-Web Plugin (using IcedTea-Web 1.2 (1.2-2ubuntu1.2)) - /usr/lib/jvm/java-7-openjdk-amd64/jre/lib/amd64/IcedTeaPlugin.so (icedtea-7-plugin)
 Shockwave Flash - /usr/lib/adobe-flashplugin/libflashplayer.so (adobe-flashplugin)
PrefSources: prefs.js
Profiles: Profile0 (Default) - LastVersion=15.0.1/20120907231657
RelatedPackageVersions:
 google-talkplugin 3.6.1.0-1
 icedtea-7-plugin 1.2-2ubuntu1.2
 adobe-flashplugin 11.2.202.238-0precise1
RfKill:

RunningIncompatibleAddons: False
SourcePackage: firefox
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 05/10/2011
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 0701
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: P6X58D-E
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0701:bd05/10/2011:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP6X58D-E:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Paul White (paulw2u)]

We are sorry that we do not always have the capacity to review all reported bugs in a timely manner. You reported this bug some time ago and there have been many changes in Ubuntu and Firefox since that time.

Ubuntu 12.04 (precise) reached end-of-life on April 28, 2017.

Do you still see a problem related to the one that you reported using currently supported versions of Firefox and Ubuntu? Please let us know if you do otherwise this report can be left to expire in approximately 60 days time.

Thank you for helping make Ubuntu better.

Paul White
[Ubuntu Bug Squad]

[Launchpad Janitor (janitor)]

[Expired for firefox (Ubuntu) because there has been no activity for 60 days.]