Arch Linux

Description:
After updating my system, kwin crashes once restarted with this output:

QDBusConnection: session D-Bus connection created before QCoreApplication.ay misbehave.
OpenGL vendor string: Intel Open Source Technology Cente
OpenGL renderer string: Mesa DRI Mobile Intel® GM45 Expre
OpenGL version string: 2.1 Mesa 9.0.1
OpenGL shading language version string: 1.20
Driver: Intel
GPU class: i965
OpenGL version: 2.1
GLSL version: 1.20
Mesa version: 9.0.1
X server version: 1.13
Linux kernel version: 3.6.8
Direct rendering: yes
Requires strict binding: no
GLSL shaders: yes
Texture NPOT support: yes
intel_do_flush_locked failed: Error de entrada/salida
QThreadStorage: Thread 0xda4740 exited after QThreadStorage 14 destroyed
QThreadStorage: Thread 0xda4740 exited after QThreadStorage 13 destroyed
QThreadStorage: Thread 0xda4740 exited after QThreadStorage 12 destroyed

kwin_gles crashes with similar output.

After some usage, I've noticed that firefox crashes with similar output as well, depending on the open tabs. I'm able to consistently crash firefox (17.0.1) visiting bugs.kde.org. The console trace is the same:

intel_do_flush_locked failed: Error de entrada/salida (Input/Output Error)

I guess these are the suspicious packages, being intel's one the most appealing:
[2012-12-01 09:09] upgraded qt (4.8.3-6 -> 4.8.4-1)
[2012-12-01 09:09] upgraded xf86-video-intel (2.20.13-1 -> 2.20.14-1)

I've also detected the following trace on my Xorg.0.log file:

(EE) [mi] EQ overflowing. Additional events will be discarded until existing events are processed.
(EE)
(EE) Backtrace:
(EE) 0: /usr/bin/X (xorg_backtrace+0x36) [0x58a326]
(EE) 1: /usr/bin/X (mieqEnqueue+0x26b) [0x56b68b]
(EE) 2: /usr/bin/X (0x400000+0x4c632) [0x44c632]
(EE) 3: /usr/lib/xorg/modules/input/evdev_drv.so (0x7f3bbd549000+0x5f74) [0x7f3bbd54ef74]
(EE) 4: /usr/bin/X (0x400000+0x75b87) [0x475b87]
(EE) 5: /usr/bin/X (0x400000+0x9f248) [0x49f248]
(EE) 6: /usr/lib/libpthread.so.0 (0x7f3bc0d13000+0xf1a0) [0x7f3bc0d221a0]
(EE) 7: /usr/lib/libc.so.6 (ioctl+0x7) [0x7f3bbfa5f837]
(EE) 8: /usr/lib/libdrm.so.2 (drmIoctl+0x28) [0x7f3bc0b0a978]
(EE) 9: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f3bbe704000+0x37f4f) [0x7f3bbe73bf4f]
(EE) 10: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f3bbe704000+0x388b0) [0x7f3bbe73c8b0]
(EE) 11: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f3bbe704000+0x3a490) [0x7f3bbe73e490]
(EE) 12: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f3bbe704000+0x5e0fc) [0x7f3bbe7620fc]
(EE) 13: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f3bbe704000+0x6d769) [0x7f3bbe771769]
(EE) 14: /usr/bin/X (WakeupHandler+0x9c) [0x43c20c]
(EE) 15: /usr/bin/X (WaitForSomething+0x1a4) [0x587764]
(EE) 16: /usr/bin/X (0x400000+0x37bb1) [0x437bb1]
(EE) 17: /usr/bin/X (0x400000+0x2696a) [0x42696a]
(EE) 18: /usr/lib/libc.so.6 (__libc_start_main+0xf5) [0x7f3bbf9a1725]
(EE) 19: /usr/bin/X (0x400000+0x26cad) [0x426cad]
(EE)
(EE) [mi] These backtraces from mieqEnqueue may point to a culprit higher up the stack.
(EE) [mi] mieq is *NOT* the cause. It is a victim.


Additional info:
Kde 4.9.3
kernel: Linux 3.6.8-1-ARCH #1 SMP PREEMPT Mon Nov 26 22:10:40 CET 2012 x86_64 GNU/Linux


Steps to reproduce:
Launch kwin or kwin_gles