X freezes in KDE with effects via OpenGL

[anti_social]

I use Arch Linux with KDE 4.7 and sometimes X server freezes (sometimes it resumes after several seconds).

Linux kernel - 3.0.7
X.org - 1.11.1.901
Nvidia driver - 285.05.09

dmesg output:

NVRM: os_schedule: Attempted to yield the CPU while in atomic or interrupt context

Xorg.0.log output:

[432767.687] [mi] EQ overflowing. The server is probably stuck in an infinite loop.
[432767.711] 
Backtrace:
[432767.899] 0: /usr/bin/X (xorg_backtrace+0x37) [0x81c0117]
[432767.899] 1: /usr/bin/X (mieqEnqueue+0x185) [0x819e675]
[432767.899] 2: /usr/bin/X (0x8048000+0x42ce5) [0x808ace5]
[432767.899] 3: /usr/bin/X (xf86PostMotionEventM+0xf9) [0x80c8cf9]
[432767.899] 4: /usr/bin/X (xf86PostMotionEventP+0x86) [0x80c8df6]
[432767.899] 5: /usr/lib/xorg/modules/input/evdev_drv.so (0xb47af000+0x2abe) [0xb47b1abe]
[432767.899] 6: /usr/lib/xorg/modules/input/evdev_drv.so (0xb47af000+0x3bcd) [0xb47b2bcd]
[432767.899] 7: /usr/bin/X (0x8048000+0x6b5a1) [0x80b35a1]
[432767.900] 8: /usr/bin/X (0x8048000+0x92bc2) [0x80dabc2]
[432767.900] 9: (vdso) (__kernel_sigreturn+0x0) [0xb77a3400]
[432767.900] 10: /usr/lib/xorg/modules/drivers/nvidia_drv.so (0xb4d43000+0x5ce12) [0xb4d9fe12]

[ShiningArcanine]

See:

http://www.nvnews.net/vbulletin/showthread.php?t=157499