Re: offline mode
Clean boot didn't seem to make any difference. I tried giving EA Support a call, just to throw a few ideas by them about the issue... I was told that I "owned too many of the expansion packs" and "that was the cause of my problems"... ? I'm still laughing.
As long as I play with Online Feature Access shut off, things are running great. If I do go online to check community creations, I make sure to log off after - dump the cache directory - and switch Online Feature Access back off again before loading a save.