[Bug 1015751] [NEW] Text is randomly rendered bold when scrolling

[Roman Skrzypiński]

Public bug reported:

I noticed that on some sites (reddit.com and a few forums) text appears
randomly bolded, even if it shouldn't be. Its appearance reverts to a
normal state after selecting the text, taking a screenshot, opening a
window over the text etc.

What you expected to happen:
Firefox displaying normal text.

What happened instead:
Firefox displays randomly bolded text when scrolling a website.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: firefox 13.0+build1-0ubuntu0.12.04.1
ProcVersionSignature: Ubuntu 3.2.0-25.40-generic-pae 3.2.18
Uname: Linux 3.2.0-25-generic-pae i686
NonfreeKernelModules: nvidia
AddonCompatCheckDisabled: False
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 2.0.1-0ubuntu8
Architecture: i386
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  romano     1832 F.... pulseaudio
 /dev/snd/pcmC0D0p:   romano     1832 F...m pulseaudio
BuildID: 20120601173917
CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found.
Card0.Amixer.info:
 Card hw:0 'NVidia'/'HDA NVidia at 0xdbff8000 irq 22'
   Mixer name	: 'Realtek ALC662 rev1'
   Components	: 'HDA:10ec0662,18493662,00100101'
   Controls      : 32
   Simple ctrls  : 17
Channel: release
Date: Wed Jun 20 20:36:18 2012
DefaultProfilePrefErrors: Unexpected character before close parenthesis @ [Profile]/extensions/{e4a8a97b-f2ed-450b-b12d-ee082ba24781}/defaults/preferences/greasemonkey.js:4
ForcedLayersAccel: False
IfupdownConfig:
 auto lo
 iface lo inet loopback
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release i386 (20120423)
IpRoute:
 default via 192.168.1.1 dev eth0  proto static 
 169.254.0.0/16 dev eth0  scope link  metric 1000 
 192.168.1.0/24 dev eth0  proto kernel  scope link  src 192.168.1.2  metric 1
IwConfig:
 lo        no wireless extensions.
 
 eth0      no wireless extensions.
MostRecentCrashID: bp-5da2c515-dd81-4bf0-8a39-9929f2120503
PciNetwork:
 
ProcEnviron:
 PATH=(custom, no user)
 LANG=pl_PL.UTF-8
 SHELL=/bin/bash
Profiles:
 Profile0 (Default) - LastVersion=13.0/20120601173917 (In use)
 Profile1 - LastVersion=13.0/20120601173917
 Profile2 - LastVersion=13.0/20120601173917
RelatedPackageVersions:
 gnome-shell       3.4.1-0ubuntu2
 icedtea-6-plugin  1.2-2ubuntu1
 rhythmbox-mozilla 2.96-0ubuntu4
 totem-mozilla     3.0.1-0ubuntu21
RfKill:
 0: hci0: Bluetooth
 	Soft blocked: no
 	Hard blocked: no
RunningIncompatibleAddons: False
SourcePackage: firefox
SubmittedCrashIDs: bp-5da2c515-dd81-4bf0-8a39-9929f2120503
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/09/2008
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: P1.50
dmi.board.name: ALiveNF6P-VSTA
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP1.50:bd04/09/2008:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvn:rnALiveNF6P-VSTA:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.name: To Be Filled By O.E.M.
dmi.product.version: To Be Filled By O.E.M.
dmi.sys.vendor: To Be Filled By O.E.M.

** Affects: firefox (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug i386 precise release-channel

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Title:
  Text is randomly rendered bold when scrolling

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