Judging by Ubuntu feedback, this seems to be a libflickrnet issue. libflickrnet was recently involved in a clusterfuck in Ubuntu Hardy: https://bugs.launchpad.net/ubuntu/+source/libflickrnet/+bug/182130 and there are apparently still some incompatibilities with the new mono.
For Ubuntu user Dani Alonso, even the mautil workaround didn't help. Instead, it output errors: http://launchpadlibrarian.net/11440518/mautil_fspot_output.txt My theory is that libflickrnet fails to register somewhere: Assembly not found: FlickrNet, Version=2.1.5.0, Culture=neutral, PublicKeyToken=2491df59efa5d132 ...causing errors in the F-Spot export classes: Load exception: System.TypeLoadException: Could not load type 'FSpot.FlickrExport' from assembly 'f-spot, Version=0.4.1.0, Culture=neutral'. ...which in turn results in the entire export extension breaking, since the export code throws an exception before defining extension points: WARNING: The add-in 'FSpot.__GalleryExport,1.0' is trying to extend '/FSpot/Menus/Exports', but there isn't any add-in defining this extension point Unlike meebey, though, I didn't look at the F-Spot source, so I may be wrong.
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