Description of problem:
Logged in. This message, together with 2 messages about Thunar crashing, appeared. Everything seems to work though. BTW, I'm using XFCE. I've also got Gnome installed but I don't like it so I don't use it.

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:         3.6.7-4.fc17.i686

backtrace:
:0: /usr/bin/Xorg (xorg_backtrace+0x4a) [0x80ac45a]
:1: /usr/bin/Xorg (mieqEnqueue+0x22b) [0x81aacfb]
:2: /usr/bin/Xorg (0x8047000+0x4589c) [0x808c89c]
:3: /usr/bin/Xorg (xf86PostButtonEventM+0xa0) [0x80da440]
:4: /usr/bin/Xorg (xf86PostButtonEvent+0xc0) [0x80da620]
:5: /usr/lib/xorg/modules/input/evdev_drv.so (0xb549b000+0x5658) [0xb54a0658]
:6: /usr/bin/Xorg (0x8047000+0x82302) [0x80c9302]
:7: /usr/bin/Xorg (0x8047000+0xa8693) [0x80ef693]
:8: (vdso) (__kernel_sigreturn+0x0) [0xb77c7400]
:9: /lib/libpixman-1.so.0 (0x48dbe000+0x86c29) [0x48e44c29]
:10: /lib/libpixman-1.so.0 (0x48dbe000+0x86d52) [0x48e44d52]
:11: /lib/libpixman-1.so.0 (pixman_image_composite32+0x3cc) [0x48dc3bac]
:12: /lib/libpixman-1.so.0 (pixman_image_composite+0xa7) [0x48dc3da7]
:13: /usr/lib/xorg/modules/libfb.so (fbComposite+0x1f9) [0xb7660159]
:14: /usr/lib/xorg/modules/libexa.so (0xb7630000+0x12065) [0xb7642065]
:15: /usr/lib/xorg/modules/libexa.so (0xb7630000+0xe6ce) [0xb763e6ce]
:16: /usr/bin/Xorg (0x8047000+0x10d475) [0x8154475]
:17: /usr/bin/Xorg (CompositePicture+0x339) [0x81486d9]
:18: /usr/bin/Xorg (0x8047000+0x105edd) [0x814cedd]
:19: /usr/bin/Xorg (0x8047000+0x101dbf) [0x8148dbf]
:20: /usr/bin/Xorg (0x8047000+0x303fd) [0x80773fd]
:21: /usr/bin/Xorg (0x8047000+0x1dce5) [0x8064ce5]
:22: /lib/libc.so.6 (__libc_start_main+0xf5) [0x47123635]
:23: /usr/bin/Xorg (0x8047000+0x1e029) [0x8065029]