The Export status bar doesn't seem to be animating during the "Checking that the photo arrived" portion of the export (and a few steps immediately following). It often seems like FlickrExport is hanging on this step, when in fact it may just be taking a while to "check."
It would be nice to have a more helpful (and responsive) "check" at this stage of the export.
Using FlickrExport for iPhoto on OS X 10.5.3, iPhoto 6.0.6
FlickrExport for Aperture (3.0.0b25) doesn't seem to be ignoring the tags/keywords that have been set to be ignored when uploading. Even though I have my top-level keywords (and a few second and third level) like 'Hardware', 'Photo specs', and so on in the 'ignore these' field (I forget the exact nomenclature, Aperture's busy uploading right now), they keep appearing on Flickr.