ShotWell crashes while writing metadata to files.

[Rémy]

I have mounted the picture share of my NAS in the Pictures directory of my computer.
$mount
//192.168.0.42/photo/ on /home/remy/Pictures type cifs (rw,mand)
The share works correctly in both reading and writing. It is only a bit slow sometimes.

Shotwell shows a "Writing metadata to files" in the lower part of the left pane few seconds after I add a tag to a group of photos.
While this writing is in progress, I remove the tag on one of the photos.
Sometimes it works, sometimes, ShotWell crashes.
Here is the terminal output:
ERROR:x86_64-linux-gnu/MetadataWriter.c:1850:metadata_writer_on_photo_dequeued: assertion failed: (!_tmp0_)
Aborted

I restart ShotWell and it crashes almost immediately. Then I restart it one more time and it works (and writes metadata slowly but correctly).

Please note that I am not 100% sure that this is the reason of the crash.
Please find attached the core dump.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: shotwell 0.9.3-0ubuntu0.1
ProcVersionSignature: Ubuntu 2.6.38-11.48-generic 2.6.38.8
Uname: Linux 2.6.38-11-generic x86_64
NonfreeKernelModules: nvidia wl
Architecture: amd64
Date: Sun Aug 21 18:48:27 2011
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
SourcePackage: shotwell
UpgradeStatus: No upgrade log present (probably fresh install)

[Adam Dingle (adam-yorba)]

This bug has been reported upstream here:

http://redmine.yorba.org/issues/3641

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.