Unfortunately the problem still persists. I checked to make sure flash was enabled for http://www.airport-data.com/, which it was, but I still get the same error message.
Something to note: on Safari which is what I normally use, when I open the workshop and click "Upload Photos" the pop-up window never opens to select which photos I want to upload.
I am not blocking pop-up windows either so I'm not sure why this is happening, but on other browsers like Google Chrome and Firefox the window opens as it should.
Hopefully Ken receives your message and can find a solution to the problem because I am out of ideas at this point :?