I can't download a book in the iPad ADE app - getting "Connection Error Detected" message every time I try:
Digital Editions could not connect to the fulfillment server. Please make sure you are connected to the internet.
I was able to authrorize the app with my Adobe ID, and I was able to download that book on my PC, so the fulfillment server is clearly working fine. And looking at the reviews of ADE in App Store, looks like lots of people have the same problem as me.