(In reply to comment #64)
> That's unexpected - those updates should have had no impact upon this issue.
> :|

Nevertheless, the overall look and feel in firefox was improved somehow.
Now I've updated mesa to 9.1.2 and kernel to 3.9.0 and these positive
effects are preserved.

The situation is much better now than it was when I opened this bug: I
don't have random huge screen corruptions in firefox both in thumbnails
and during normal browsing. Though I can still trigger this issue and
get corrupted page preview, it doesn't interfere with browsing. All
other applications are unaffected.

Since, things are quite good now, maybe it is a good idea to enable back
that optimizations? What do you think? It looks like I am the only one
who has this issue:(

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You received this bug notification because you are a member of Desktop
Packages, which is subscribed to xserver-xorg-video-intel in Ubuntu.
https://bugs.launchpad.net/bugs/1144558

Title:
  Images corruption in firefox when using "sna"

Status in X.org xf86-video-intel:
  Confirmed
Status in “xserver-xorg-video-intel” package in Ubuntu:
  Fix Released
Status in “xserver-xorg-video-intel” source package in Raring:
  Fix Released

Bug description:
  Since "sna" is in using in raring users are reporting pixmap
  corruptions in firefox, I see the issue on an i5 cpu. The same problem
  has been reported by i965 users as well

  ProblemType: Bug
  DistroRelease: Ubuntu 13.04
  Package: xserver-xorg-video-intel 2:2.21.3-0ubuntu1
  ProcVersionSignature: Ubuntu 3.8.0-8.17-generic 3.8.0
  Uname: Linux 3.8.0-8-generic i686
  .tmp.unity.support.test.0:
   
  ApportVersion: 2.9-0ubuntu2
  Architecture: i386
  CompizPlugins: 
[core,composite,opengl,compiztoolbox,decor,snap,gnomecompat,mousepoll,place,session,resize,move,wall,grid,imgpng,vpswitch,unitymtgrabhandles,regex,animation,expo,fade,workarounds,scale,ezoom,unityshell]
  CompositorRunning: compiz
  CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
  CompositorUnredirectFSW: true
  Date: Mon Mar  4 16:00:20 2013
  DistUpgraded: Fresh install
  DistroCodename: raring
  DistroVariant: ubuntu
  EcryptfsInUse: Yes
  ExtraDebuggingInterest: Yes
  GraphicsCard:
   Intel Corporation Core Processor Integrated Graphics Controller [8086:0046] 
(rev 02) (prog-if 00 [VGA controller])
     Subsystem: Dell Device [1028:040a]
  InstallationDate: Installed on 2010-10-09 (877 days ago)
  InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
  MachineType: Dell Inc. Latitude E6410
  MarkForUpload: True
  PccardctlIdent:
   Socket 0:
     no product info available
  PccardctlStatus:
   Socket 0:
     no card
  PlymouthDebug: Error: [Errno 13] Permission non accordée: 
'/var/log/plymouth-debug.log'
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-8-generic 
root=UUID=555ebc11-d747-44d3-af56-5e7d17851ce3 ro quiet splash vt.handoff=7
  SourcePackage: xserver-xorg-video-intel
  UpgradeStatus: No upgrade log present (probably fresh install)
  XorgConf:
   Section "Device"
               Identifier "intel"
               Driver "intel"
               Option "Accelmethod" "uxa"
       EndSection
  dmi.bios.date: 11/30/2011
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A11
  dmi.board.name: 0HNGW4
  dmi.board.vendor: Dell Inc.
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: 
dmi:bvnDellInc.:bvrA11:bd11/30/2011:svnDellInc.:pnLatitudeE6410:pvr0001:rvnDellInc.:rn0HNGW4:rvr:cvnDellInc.:ct9:cvr:
  dmi.product.name: Latitude E6410
  dmi.product.version: 0001
  dmi.sys.vendor: Dell Inc.
  version.compiz: compiz 1:0.9.9~daily13.03.01-0ubuntu1
  version.libdrm2: libdrm2 2.4.42-0ubuntu1
  version.libgl1-mesa-dri: libgl1-mesa-dri 9.0.2-0ubuntu1
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 9.0.2-0ubuntu1
  version.xserver-xorg-core: xserver-xorg-core 2:1.13.2-0ubuntu2
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu2
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.1.0-0ubuntu1
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.21.3-0ubuntu1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 
1:1.0.6-0ubuntu3

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