Are you using FileMaker Server?. If not, which computer and what version of FM is being used to host the database?
Thank you for responding, I'm ready to jump off a bridge here.
Not using FM Server. Our database file is currently being stored on a network drive. One of the FMP 7.0 users log on to it as the host and the rest of us log in remotely to her. We are in the process of switching over to a "proper" networked environment, but have not implemented it yet.
During testing and troubleshooting this morning, I have switched the "host" user many times and I am still coming up with the same conclusion. One of the FMP 7.0 users embed files differently in container fields than the others. And the other 3 embed this "image" of the document that lags everybody down.