I had the same issue that RLS encountered. In my case, it showed up upon installation in Windows 7 Professional (with *all* Windows Updates current to 9/3/12) executing in a Parallels Virtual Machine running on Mac (Lion, version 10.7.4). I took the advice of installing Foxit as my (default) PDF reader and everything worked fine with doPDF (version 7, build 382). My original Acrobat Reader is version 10.1.4. At this point, I like the Foxit Reader as it seems to be very fast, so I'll stick with it. If problems arise, I'm confident now that I can switch the file association back to Acrobat and encounter the same success as documented above by RLS.
So kudos for posting this issue and providing me with a solution, although it still seems a bit odd that the problem ever should have occurred in the first place.