Hallo! I am having the same problem. Please someone advise on how I can fix this! I have 2 books I downloaded and I need to read it asap and it keeps crashing telling me it sends a report but nothing is changing? Thank you!
Same prob on Mac OS X 10.10.1 with ADE 4.0. Crashes 2 out of 3 times and when it does crash it creates epubs that have 0 pages and are corrupt when viewed in iBooks.
Downgraded to ADE 1.7 using this discussion (ACSM files cause Adobe Digital Editions to crash) and now it works without crashing and downloads new ACSM bookmarks fine. BUT... when I reauthorized the new version of the program I lost access to the previously checked-out books (the ACSM files created errors).
At least it effing works now with new checkouts.