I combined several pdf files in Architect today (August 12, 2014. I used Adobe reader XI to check the files. Adobe reader XI would not open them as in the past. I then attempted to open several Architect files I had authored in Architect 2 weeks ago. Adobe XI would not open them either. However, two weeks ago Adobe Reader would open them. I think Adobe may have updated their reader.
Have you had any reports of Adobe XI reader not opening Architect files? The Architect files were authored with the previous version of the app, not 2.0. Could Adobe be releasing a new version of reader that prevents pdf files from being opened if they are authored in Architect?