Description of problem:
just after booting. kde started. I did nothing.

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

Additional info:
libreport version: 2.0.16
abrt_version:   2.0.16
kernel:         3.6.3-1.fc17.i686.PAE

backtrace:
:0: /usr/bin/X (xorg_backtrace+0x4a) [0x80ac45a]
:1: /usr/bin/X (mieqEnqueue+0x22b) [0x81aacfb]
:2: /usr/bin/X (0x8047000+0x4589c) [0x808c89c]
:3: /usr/bin/X (xf86PostMotionEventM+0x253) [0x80d9ec3]
:4: /usr/lib/xorg/modules/input/evdev_drv.so (0xb3820000+0x3e2e) [0xb3823e2e]
:5: /usr/lib/xorg/modules/input/evdev_drv.so (0xb3820000+0x5534) [0xb3825534]
:6: /usr/bin/X (0x8047000+0x82302) [0x80c9302]
:7: /usr/bin/X (0x8047000+0xa8693) [0x80ef693]
:8: (vdso) (__kernel_sigreturn+0x0) [0xb7747400]
:9: /lib/libXfont.so.1 (0x4d14f000+0x7967) [0x4d156967]
:10: /lib/libXfont.so.1 (0x4d14f000+0x7988) [0x4d156988]
:11: /lib/libXfont.so.1 (0x4d14f000+0x7988) [0x4d156988]
:12: /lib/libXfont.so.1 (0x4d14f000+0x7988) [0x4d156988]
:13: /lib/libXfont.so.1 (FontFileFindNamesInScalableDir+0xf6) [0x4d1570b7]
:14: /lib/libXfont.so.1 (0x4d14f000+0x9eda) [0x4d158eda]
:15: /lib/libXfont.so.1 (FontFileStartListFonts+0x5c) [0x4d1596e8]
:16: /lib/libXfont.so.1 (0x4d14f000+0xbeea) [0x4d15aeea]
:17: /usr/bin/X (0x8047000+0x313df) [0x80783df]
:18: /usr/bin/X (ListFonts+0x182) [0x807a2a2]
:19: /usr/bin/X (0x8047000+0x2b283) [0x8072283]
:20: /usr/bin/X (0x8047000+0x303fd) [0x80773fd]
:21: /usr/bin/X (0x8047000+0x1dce5) [0x8064ce5]
:22: /lib/libc.so.6 (__libc_start_main+0xf5) [0x4cf15635]
:23: /usr/bin/X (0x8047000+0x1e029) [0x8065029]