ripples crashed with SIGSEGV in xcb_poll_for_event()

[espentv]

Binary package hint: xscreensaver

The bug happens when I leave my computer. When I come back the screensaver isn't on, and the crash message appears. I'm running Ubuntu hardy (development branch).

The OS was installed using kubuntu-kde4-8.04-beta-desktop-amd64, but I removed KDE4 and installed XFCE4 as my window manager some weeks ago. I'm keeping the OS updated with all the updates from the repos.

ProblemType: Crash
Architecture: amd64
CrashCounter: 1
Date: Tue Apr 1 05:06:09 2008
DistroRelease: Ubuntu 8.04
ExecutablePath: /usr/lib/xscreensaver/ripples
NonfreeKernelModules: nvidia
Package: xscreensaver-data 5.04-2ubuntu2
PackageArchitecture: amd64
ProcCmdline: ripples -root -oily -light 2 -stir
ProcEnviron:
 PATH=/usr/lib/xscreensaver:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
 LANG=en_US.UTF-8
 SHELL=/bin/bash
Signal: 11
SourcePackage: xscreensaver
StacktraceTop:
 ?? () from /usr/lib/libxcb.so.1
 xcb_poll_for_event () from /usr/lib/libxcb.so.1
 ?? () from /usr/lib/libX11.so.6
 _XReply () from /usr/lib/libX11.so.6
 XSync () from /usr/lib/libX11.so.6
Title: ripples crashed with SIGSEGV in xcb_poll_for_event()
Uname: Linux 2.6.24-12-generic x86_64
UserGroups: adm admin audio cdrom dialout dip floppy fuse lpadmin plugdev sambashare video

[espentv (espen-tveit)]

Here is my xorg.conf, if that can help shed some light onto the issue.