Comment 6 for bug 791213

Using the information about missing symbols furnished by Didier Roche's trace, I just installed all the relevant debug symbol packages and ran unity-2d-places from the Terminal. In this way, I created duplicate bug 793044, which contains a considerably more complete stack trace (for all threads), and also possibly relevant console messages.

For those of you who are only interested in looking at the stack trace:
https://bugs.launchpad.net/ubuntu/+source/unity-2d/+bug/793044/+attachment/2155414/+files/Stacktrace.txt
https://bugs.launchpad.net/ubuntu/+source/unity-2d/+bug/793044/+attachment/2155415/+files/ThreadStacktrace.txt

For more details, see bug 793044 itself.