Since recently X server frequently dies on activities that involve switching
terminal (user switching, resume etc). Crash stack:

Backtrace:
0: /etc/X11/X(xorg_backtrace+0x37) [0x8134527]
1: /etc/X11/X(xf86SigHandler+0x56) [0x80cd856]
2: [0xffffe400]
3: /usr/lib/libpixman-1.so.0 [0xb7f67cb0]
4: /usr/lib/libpixman-1.so.0(pixman_fill+0x148) [0xb7f62af8]
5: /usr/lib/xorg/modules//libfb.so(fbFill+0x4cd) [0xb79e9fad]
6: /usr/lib/xorg/modules//libfb.so(fbPolyFillRect+0x177) [0xb79ea1c7]
7: /usr/lib/xorg/modules//libxaa.so [0xb79c86a9]
8: /etc/X11/X [0x81829ca]
9: /etc/X11/X(miPaintWindow+0x244) [0x8112804]
10: /etc/X11/X(miWindowExposures+0x132) [0x8112b62]
11: /etc/X11/X [0x80cb5e6]
12: /etc/X11/X(miHandleValidateExposures+0x6b) [0x812c2db]
13: /etc/X11/X(MapWindow+0x246) [0x80726b6]
14: /etc/X11/X(ProcMapWindow+0x6b) [0x808896b]
15: /etc/X11/X(Dispatch+0x34f) [0x808922f]
16: /etc/X11/X(main+0x395) [0x806cfb5]
17: /lib/i686/libc.so.6(__libc_start_main+0xe5) [0xb7bce5c5]
18: /etc/X11/X [0x806c491]

Fatal server error:
Caught signal 11.  Server aborting

Installed packages:

libpixman-1_0-0.13.2-1mdv2009.1
x11-data-bitmaps-1.0.1-7mdv2009.0
x11-data-cursor-themes-1.0.1-7mdv2009.0
x11-data-xkbdata-1.4-1mdv2009.1        
x11-docs-1.4-3mdv2009.0                
x11-driver-input-evdev-2.1.0-2mdv2009.1
x11-driver-input-joystick-1.3.2-2mdv2009.0
x11-driver-input-keyboard-1.3.1-3mdv2009.1
x11-driver-input-mouse-1.3.0-2mdv2009.0   
x11-driver-input-void-1.1.1-5mdv2009.0    
x11-driver-video-dummy-0.3.0-3mdv2009.1   
x11-driver-video-trident-1.3.1-2mdv2009.1 
x11-driver-video-vesa-2.1.0-1mdv2009.1    
x11-driver-video-vga-4.1.0-8mdv2009.1     
x11-font-adobe-100dpi-1.0.0-6mdv2009.0    
x11-font-adobe-75dpi-1.0.0-6mdv2009.0     
x11-font-adobe-utopia-100dpi-1.0.1-6mdv2009.0
x11-font-adobe-utopia-75dpi-1.0.1-6mdv2009.0 
x11-font-adobe-utopia-type1-1.0.1-6mdv2009.0
x11-font-alias-1.0.1-13mdv2009.0
x11-font-arabic-misc-1.0.0-6mdv2009.0
x11-font-bh-100dpi-1.0.0-6mdv2009.0
x11-font-bh-75dpi-1.0.0-6mdv2009.0
x11-font-bh-lucidatypewriter-100dpi-1.0.0-6mdv2009.0
x11-font-bh-lucidatypewriter-75dpi-1.0.0-6mdv2009.0
x11-font-bh-ttf-1.0.0-6mdv2009.0
x11-font-bh-type1-1.0.0-6mdv2009.0
x11-font-bitstream-100dpi-1.0.0-6mdv2009.0
x11-font-bitstream-75dpi-1.0.0-6mdv2009.0
x11-font-bitstream-speedo-1.0.0-6mdv2009.0
x11-font-bitstream-type1-1.0.0-6mdv2009.0
x11-font-cronyx-cyrillic-1.0.0-6mdv2009.0
x11-font-cursor-misc-1.0.0-6mdv2009.0
x11-font-cyrillic-1.0.0-7mdv2009.0
x11-font-daewoo-misc-1.0.0-7mdv2009.0
x11-font-dec-misc-1.0.0-6mdv2009.0
x11-font-encodings-1.0.2-3mdv2009.0
x11-font-ibm-type1-1.0.0-6mdv2009.0
x11-font-isas-misc-1.0.0-6mdv2009.0
x11-font-jis-misc-1.0.0-6mdv2009.0
x11-font-micro-misc-1.0.0-6mdv2009.0
x11-font-misc-cyrillic-1.0.0-6mdv2009.0
x11-font-misc-misc-1.0.0-8mdv2009.0
x11-font-mutt-misc-1.0.0-6mdv2009.0
x11-font-schumacher-misc-1.0.0-6mdv2009.0
x11-font-screen-cyrillic-1.0.1-2mdv2009.0
x11-font-sony-misc-1.0.0-6mdv2009.0
x11-font-sun-misc-1.0.0-6mdv2009.0
x11-font-winitzki-cyrillic-1.0.0-6mdv2009.0
x11-font-xfree86-type1-1.0.1-2mdv2009.0
x11-proto-devel-7.4-8mdv2009.1
x11-server-common-1.5.99.3-1.20081222.2mdv2009.1
x11-server-devel-1.5.99.3-1.20081222.2mdv2009.1
x11-server-xorg-1.5.99.3-1.20081222.2mdv2009.1
x11-xtrans-devel-1.2.2-1mdv2009.1

Xorg.log: https://qa.mandriva.com/attachment.cgi?id=11948