Hey - I've got a file uploader that works on Tiger at http://100grand.scribemedia.org . -- just tested it with a laptop (might be the flash version as well, because on this laptop I got the 'dismiss all' screen').
On 2 machines running Leopard I didn't get the plugin alert, but fileupload fails - I can't even select a .mov at all. The one on the site has a 'video' filterupload; but I've tested with no filter and it still fails. What's changed? Has there been a change to the plugin or is it leopard? Thanks.