Originals from the publisher are working the way they're supposed to. It looks like one or both of the books had become corrupted and when Reader scanned the library at start-up it would crash when it encountered the corrupt file(s).
In case you're wondering, the folder is still called "My eBooks" in Windows 7, Vista too. It's just a bit of an ugly folder tree to find it (C:\Users\"USERNAME"\My Documents\My eBooks) and that's assuming you don't get lost in the somewhat inconvenient "Libraries" folder instead. Can you tell I'm not a big fan of Windows Explorer versions that have been released since XP?
