X session crashes

[dfszb]

Binary package hint: xorg

session crashes and drops me out, the only info is in /var/log/gdm/, a logfile, saying:
This is a pre-release version of the X server from The X.Org Foundation.
It is not supported in any way.
Bugs may be filed in the bugzilla at http://bugs.freedesktop.org/.
Select the "xorg" product for bugs you find in this release.
Before reporting bugs in pre-release versions please check the
latest version in the X.Org Foundation git repository.
See http://wiki.x.org/wiki/GitPage for git access instructions.

X.Org X Server 1.4.0.90
Release Date: 5 September 2007
X Protocol Version 11, Revision 0
Build Operating System: Linux Ubuntu (xorg-server 2:1.4.1~git20080131-1ubuntu9)
Current Operating System: Linux szb-notebook 2.6.24-16-generic #1 SMP Thu Apr 10 13:23:42 UTC 2008 i686
Build Date: 15 April 2008 05:26:17PM

 Before reporting problems, check http://wiki.x.org
 to make sure that you have the latest version.
Module Loader present
Markers: (--) probed, (**) from config file, (==) default setting,
 (++) from command line, (!!) notice, (II) informational,
 (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(==) Log file: "/var/log/Xorg.0.log", Time: Thu May 1 11:27:13 2008
(==) Using config file: "/etc/X11/xorg.conf"
(II) Module "ramdac" already built-in
expected keysym, got XF86KbdLightOnOff: line 70 of pc
expected keysym, got XF86KbdBrightnessDown: line 71 of pc
expected keysym, got XF86KbdBrightnessUp: line 72 of pc
Atom 4, CARD32 4, unsigned long 4
expected keysym, got XF86KbdLightOnOff: line 70 of pc
expected keysym, got XF86KbdBrightnessDown: line 71 of pc
expected keysym, got XF86KbdBrightnessUp: line 72 of pc
SetClientVersion: 0 9
SetKbdSettings - type: -1076883508 rate: 30 delay: 500 snumlk: 28

Backtrace:
0: /usr/bin/X(xf86SigHandler+0x7e) [0x80c780e]
1: [0xb7f02420]

Fatal server error:
Caught signal 11. Server aborting
Window manager (if this matters): wmaker, last used program: firefox.

[dfszb (dnotob)]

I can reproduce it: it always happens if I visit this site from firefox:
http://developer.pidgin.im/ticket/4986
It does not happen if I visit that site with dillo, elinks, w3m etc

[Sense Egbert Hofstede (sense)]

Thank you for reporting this bug. However, it's a duplicate of an already reported bug. Please keep an eye on that bug.

[Graham Binns (gmb)]

Deleted the bug watch attached to this bug since a) The bug's a dupe and b) the watch had nothing to do with the bug and was auto-created from a comment.