emacs crashes when closing gdm

Binary package hint: emacs-snapshot

I'm using Ubuntu 10.04.1 LTS with emacs-snapshot 1:20090909-1. Other packages which are involved are GNU screen 4.0.3-14ubuntu1.2 and dbus 1.2.16-2ubuntu4.

Steps to reproduce:
1.) I assume that I'm already logged in to GNOME.
2.) Open a terminal (gnome-terminal 2.30.2-0ubuntu1, in my case)
3.) Open GNU screen ('screen -c /dev/null' or with any .screenrc)
4.) Open GNU Emacs inside GNU screen.
5.) Detach screen session (<Ctrl-a+DD)
6.) Log out from GNOME.

Now GNU Emacs generates a high load, uses lots of CPU and even more RAM (usually complete RAM plus same amount of swap space).

I made a strace and the following sequence seems to be the problem:
connect(5, {sa_family=AF_FILE, path=@"/tmp/dbus-qIVcDA4mSE"}, 23) = -1 ECONNREFUSED (Connection refused)
close(5) = 0
ioctl(3, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig -icanon -echo ...}) =
 0
ioctl(3, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig -icanon -echo ...}) =
 0
ioctl(3, SNDCTL_TMR_STOP or TCSETSW, {B38400 opost isig -icanon -echo ...}) = 0
ioctl(3, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig -icanon -echo ...}) = 0
ioctl(3, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig -icanon -echo ...}) = 0
write(3, "\7", 1) = 1
poll([{fd=8, events=POLLIN}], 1, 0) = 0 (Timeout)
socket(PF_FILE, SOCK_STREAM, 0) = 5

This repeats until I SIGKILLed emacs.

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: emacs-snapshot 1:20090909-1
ProcVersionSignature: Ubuntu 2.6.32-26.48-generic 2.6.32.24+drm33.11
Uname: Linux 2.6.32-26-generic x86_64
NonfreeKernelModules: nvidia
Architecture: amd64
Date: Thu Dec 9 23:56:00 2010
ProcEnviron:
 LANG=de_DE.utf8
 SHELL=/usr/bin/zsh
SourcePackage: emacs-snapshot