A thought...
The teamwork file with the corrupting hotlinks has 5-7 people working on it. I just realized 2 of the team members are in build 1812, while the rest of us are in 2219. Perhaps this had something to do with it? And I know one of the 1812ers was signing in as the administrator while I was on vacation.
I know we had issues with various builds using plotmaker (and not being able to see multiple view sets).
Has anyone else come across issues arrising form various builds on the same file?