Flickr Export Plugin for iPhoto

I've got iPhoto 5.0.1 installed on OS X 10.3.8. I downloaded the 1.2.1
version of the Flickr Plugin yesterday. I installed it an everything
seemed to go OK (no error messages). When I go to Export, the
panel pops up, but then when I click on the Flickr tab, iPhoto hangs. I
get this message in the console.log.

2005-02-24 13:21:00.909 iPhoto[5237] *** -[NSCFDictionary
setObject:forKey:]: attempt to insert nil value

I'm also attaching a sample of the hung iPhoto from the System
Monitor.

If I subsequently go to iPhoto's info pane and uncheck the Flickr
Plugin checkbox, everything works fine, so I think that the plugin is
definitely the problem.

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