Seems to be permission problem, probably fixed. Thanks!
Nope.
When I click 'publish', the page returns a server error (HTTP 500 (Internal Server Error)).
Oh.. Sorry, I can't reproduce it. Could you please send me the file you are trying to upload?
https://www.operationfabulous.com/ads/f9bd135a67291260f2957019cb32ef5b4ceb5db0.png
Right click -> Save as.
Hmm.. Strange, it works for me: https://anonymousads.com/ad/393
What browser are you using?
Latest version of Chrome.
I can see in logs error 500 but it doesn't seem to be related to banner. Btw, did you specify correct link upon ad creation? Could you please test if it works at AA2 staging server?