Description of problem:
Tryed to create a new user session from a screen lock and xorg crashed.

Version-Release number of selected component:
xorg-x11-server-Xorg-1.12.3-2.fc17

Additional info:
libreport version: 2.0.18
abrt_version:   2.0.18
kernel:         3.6.6-1.fc17.x86_64

backtrace:
:0: /usr/bin/X (xorg_backtrace+0x36) [0x4652d6]
:1: /usr/bin/X (mieqEnqueue+0x26b) [0x5514db]
:2: /usr/bin/X (0x400000+0x47f32) [0x447f32]
:3: /usr/lib64/xorg/modules/input/evdev_drv.so (0x7f47524f9000+0x60e4) [0x7f47524ff0e4]
:4: /usr/bin/X (0x400000+0x807b7) [0x4807b7]
:5: /usr/bin/X (0x400000+0xa4ab0) [0x4a4ab0]
:6: /lib64/libpthread.so.0 (0x3570400000+0xefe0) [0x357040efe0]
:7: /usr/bin/X (LogVMessageVerb+0x45) [0x469635]
:8: /usr/bin/X (ErrorF+0x8c) [0x46901c]
:9: /usr/bin/X (mieqProcessInputEvents+0x1d2) [0x551b02]
:10: /usr/bin/X (ProcessInputEvents+0x9) [0x480839]
:11: /usr/bin/X (0x400000+0x34132) [0x434132]
:12: /usr/bin/X (0x400000+0x23485) [0x423485]
:13: /lib64/libc.so.6 (__libc_start_main+0xf5) [0x3570021735]
:14: /usr/bin/X (0x400000+0x2375d) [0x42375d]