Xorg segfaults after upgrade of Fedora Core 13->14

[Mathew Hennessy]

Hi,
	I'm getting periodic Xorg segfaults after upgrading from FC13 to FC14
on i686..  Here's what it left as a backtrace in Xorg.0.log.old:

[ 81396.084]
Backtrace:
[ 81396.103] 0: /usr/bin/Xorg (xorg_backtrace+0x39) [0x80c6ea1]
[ 81396.103] 1: /usr/bin/Xorg (0x8048000+0x4dbb7) [0x8095bb7]
[ 81396.103] 2: (vdso) (__kernel_rt_sigreturn+0x0) [0xa1940c]
[ 81396.103] 3: /usr/bin/Xorg (doListFontsWithInfo+0xb6) [0x806ca74]
[ 81396.103] 4: /usr/bin/Xorg (ProcessWorkQueue+0x28) [0x806f93c]
[ 81396.103] 5: /usr/bin/Xorg (WaitForSomething+0x48) [0x80906c6]
[ 81396.103] 6: /usr/bin/Xorg (0x8048000+0x2404f) [0x806c04f]
[ 81396.103] 7: /usr/bin/Xorg (0x8048000+0x1a434) [0x8062434]
[ 81396.103] 8: /lib/libc.so.6 (__libc_start_main+0xe6) [0x6e0e16]
[ 81396.103] 9: /usr/bin/Xorg (0x8048000+0x19f61) [0x8061f61]
[ 81396.103] Segmentation fault at address (nil)
[ 81396.103]
Fatal server error:
[ 81396.103] Caught signal 11 (Segmentation fault). Server aborting
[ 81396.103]
[ 81396.103]
Please consult the Fedora Project support
         at http://wiki.x.org
 for help.
[ 81396.104] Please also check the log file at "/var/log/Xorg.0.log" for
additional information.
[ 81396.104]
[ 81396.104] (II) Power Button: Close
[ 81396.104] (II) UnloadModule: "evdev"
[ 81396.104] (II) Power Button: Close
[ 81396.104] (II) UnloadModule: "evdev"
[ 81396.105] (II) Venus USB2.0 Camera: Close
[ 81396.105] (II) UnloadModule: "evdev"
[ 81396.105] (II) HID 062a:0000: Close
[ 81396.105] (II) UnloadModule: "evdev"
[ 81396.106] (II)   USB Keyboard: Close
[ 81396.106] (II) UnloadModule: "evdev"
[ 81396.107] (II)   USB Keyboard: Close
[ 81396.107] (II) UnloadModule: "evdev"

Here's info on the host, it's a Sun Ultra20 Opteron workstation with
Quadro 1400 GPU

[root at marvin log]# rpm -qi xorg-x11-server-Xorg
Name        : xorg-x11-server-Xorg         Relocations: (not
relocatable)
Version     : 1.9.1                             Vendor: Fedora Project
Release     : 2.fc14                        Build Date: Sun Oct 24
19:23:18 2010
Install Date: Tue Nov 16 13:44:46 2010         Build Host:
x86-19.phx2.fedoraproject.org
Group       : User Interface/X              Source RPM:
xorg-x11-server-1.9.1-2.fc14.src.rpm
Size        : 3460534                          License: MIT
Signature   : RSA/SHA256, Tue Oct 26 14:13:38 2010, Key ID
421caddb97a1071f
Packager    : Fedora Project
URL         : http://www.x.org
Summary     : Xorg X server
Description :
X.org X11 is an open source implementation of the X Window System.  It
provides the basic low level functionality which full fledged
graphical user interfaces (GUIs) such as GNOME and KDE are designed
upon.
[root at marvin log]# rpm -qi xorg-x11-drv-nvidia 
Name        : xorg-x11-drv-nvidia          Relocations: (not
relocatable)
Version     : 260.19.12                         Vendor: RPM Fusion
Release     : 3.fc14                        Build Date: Sun Oct 24
17:24:06 2010
Install Date: Tue Nov 16 14:11:25 2010         Build Host:
hephaestus.wilsonet.com
Group       : User Interface/X Hardware Support   Source RPM:
xorg-x11-drv-nvidia-260.19.12-3.fc14.src.rpm
Size        : 10339035                         License: Redistributable,
no modification permitted
Signature   : RSA/SHA256, Tue Oct 26 14:30:45 2010, Key ID
80648b53f09d8368
Packager    : <http://nonfree.rpmfusion.org/>
URL         : http://www.nvidia.com/
Summary     : NVIDIA's proprietary display driver for NVIDIA graphic
cards
Description :
This package provides the most recent NVIDIA display driver which allows
for
hardware accelerated rendering with NVIDIA chipsets GeForce6 series and
newer.
GeForce5 and below are NOT supported by this release.

For the full product support list, please consult the release notes
for driver version 260.19.12.
[root at marvin log]# uname -a
Linux marvin.thoughtcrime.com 2.6.35.6-48.fc14.i686 #1 SMP Fri Oct 22
15:34:36 UTC 2010 i686 i686 i386 GNU/Linux
[root at marvin log]# cat /etc/redhat-release
Fedora release 14 (Laughlin)


TIA,
= Matt