Could be the Entourage identities folder. All Office programs use that also.
So you decided not to try the font thing I mentioned? Oh well. Good luck. I'm moving on then.
Seriously? I said right there that I deleted it all too! Anyway, Entourage is the only one that was working to begin with, it stopped working after I messed around with it some more.
But then I did a safe boot, uninstalled everything (again!), emptied the trash, moved all my fonts to the trash (all but system fonts - and left it there), reinstalled everything back (yet again!!) and only managed to get Entourage working again.
Also, Libre Office doesn't handle well my macros, so I'm stuck until I can reformat the whole disk - crappy solution the Microsoft way...