Bicknellski,
That is exactly what I was talking about yes. Why it happens I'm not exactly sure. The old wallet was still adding blocks and diverging on another chain. So I suppose the wallet was simply unable to reconcile previous transaction. But my question to you is: since, 32 bit applications are supposed to be able to run on 64 bit Windows is you computer an AMD machine? Mine is. I thought that may be the problem.