Eh, why can't whomever goes about fixing the bug make their own backtrace?
I'll try duplicating the steps described again to include debugging symbols.
The bug has been confirmed by others, however.
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gnome-background-properties: crash on drag-n-drop to Add Wallpaper
Here you go. It says there are no debugging symbols, but the output
contained a very descriptive error message from GLib, so it should help.
** Attachment added: gdb-gnome-background-properties.txt
http://launchpadlibrarian.net/8652228/gdb-gnome-background-properties.txt
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You have been subscribed to a public bug:
Binary package hint: gnome-control-center
Right click desktop...
Change Desktop Background
Add Wallpaper
The Places sidepanel does not show mounted HD volumes, with the exception of
Filesystem.
Drag a disk volume icon from the desktop over to the Places
