I've been having these problems for a few weeks and left it in the hope that it would disappear as mysteriously as it appeared, but no such luck. Here we go, then.
I'm running NLp2.
Problem #1: Every time I play the game and come back out again, 2-8 (usually
"Unknown" Sim Descriptions appear in SimPE. They have new instance numbers, so I don't *think* they're artifacts of previously deleted sims, but it's possible.
Normally they do not create relationship, memory, DNA, or Wants&Fears entries.
I have been doing neighborhood cleanup in SimPE for quite a while now, deleting townies and Sims I messed up with before I knew which actions would lead to firey balls visable from space. (Fortunately I'd never lotbinned anything occupied...) I'm using the method discussed in the SimPE forums and elsewhere (which means I have to periodically re-correct recessive DNA, but that's an entirely different problem).
Problem #2: I think this is unrelated, but it presents similarly. Any time I play a Uni dorm (all my students are in dorms, so I never play other lots at Uni), two new professors are created. It's not two professors per dorm, though; it's two professors per play session including any visit to Uni. They are complete with DNA and Wants&Fears, have no relations, and have only the [invisible] Token - Sim - Initialized "memory".
I suspect this dates to long before my Unknown spam started, since I see pairs of professors unconnected to the Uni install all through the subsequent Sim Descriptions.
I have Twojeffs' "No Meeting Professors", which I suppose may be connected. However, even short visits to a dorm to re-outfit a newly-arrived student (which don't include anyone going to class or finals) produce this spam, so I'm doubtful.
Has anyone else got any similar issues? Has anyone got any clue as to what is causing this? It's not a huge deal as the spam takes perhaps 5 minutes to clean up in SimPE every time I exit the game, but I'd very much like to know.