Here's what I think is a bug, see what you all think:
I though the OldVersions folder would be a good place to store other files that are... "old".
So if you save Inventor files into this folder which don't contain the ".XXX" (revision number) within the file name, selecting the file in the open dialog window causes a serious error: invalid string position.
It seems to me that the program does not include error trapping if it does not encounter the "." in the filename.
This seems like something that could easily be fixed in the next SP or release...