polkit-gnome-authentication-agent-1 crashed with SIGSEGV in g_datalist_id_set_data_full()

StacktraceTop:
 g_datalist_id_set_data_full (
 ?? ()
 ?? ()
 ?? ()
 ?? ()

Thank you for your report!

However, processing it in order to get sufficient information for the
developers failed (it does not generate an useful symbolic stack trace). This
might be caused by some outdated packages which were installed on your system
at the time of the report:

libdbus-glib-1-2-dbg: installed version 0.88-2, latest version: 0.88-2.1

Please upgrade your system to the latest package versions. If you still
encounter the crash, please file a new report.

Thank you for your understanding, and sorry for the inconvenience!

I have the same bug, not sure how it happened, got a crash report when getting back from tea, saw it after unlocking my screen.
I do have version 0.88-2.1 of libdbus-glib-1-2-dbg.

I had that crash righ after login. i have started a terminal and did a sudo apt-get update and a sudo apt-get upgrade then i have started firefox and got that crash report

when i do sudo apt-get upgrade some packages are marked as kept back:

The following packages have been kept back:
  desktopcouch empathy empathy-common exiv2 ghostscript ghostscript-x
  gnome-orca jockey-common jockey-gtk language-selector
  language-selector-common libubuntuone-1.0-1 linux-generic
  linux-headers-generic linux-image-generic nautilus-sendto-empathy
  poppler-utils python-couchdb python-ubuntuone python-webkit rhythmbox
  rhythmbox-plugin-cdrecorder rhythmbox-plugins shotwell yelp
0 upgraded, 0 newly installed, 0 to remove and 25 not upgraded.

i don't know but maybe it is related to some missing libraries or that im not using the newest libraries.

Seeing this crash immediately following login on updated natty.

I rebooted from un-installing the fglrx-ati amd64 driver.
Thats from another bug, which only gives wallpaper.
So rebooting gave me all the panels and Ctrl+Alt+T, for now... plus this crash--right after login..
Previously updated some outdated packages--not doing all updates just yet! ;)

can't edit here... installed version: natty daily-live 20110125 amd64

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 697095, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.