Good news, perhaps, I logged in as another test user and the Flash uploader worked fine for me. That would seem to indicate that something is wrong with my account, but I have no clue as to what. Either some permission for some usergroup I am a member of isn't set correctly or something else? Since you have admin access can you look at my account and its usergroups and see if you can spot what is causing the issue for me, but not for others? TIA!