i'll revise my earlier review and knock off another star:
today i've spent several hours tagging 182 photos for upload. on uploading, flickr uploadr has now been frozen on the 160th image for about 20 mins. no options to cancel the upload and apparently no "time-out" built into the app in case something like this happens.
so now i sit waiting and hoping that sometime before the end the century, flickr uploadr will either finish the upload, or realise that something's gone wrong and time out. otherwise my only option is to force quit - losing all the info for the 22 photos still to upload, which i've spent so long entering.
this really is a very frustratingly and poorly designed piece of software! it's all the more annoying as the flickr website itself is a masterpiece of thoughtful well-designed functionality.