It seems somethimes the location of the zoom center is lost, there is more cases in the web, probably is the memory corrupts, gods know why??!!...
One solution is to make fly mode, and then the zoom center is restored in memory. Perphaps ome function to restore zoom center, or perphaps a rect zoom, without looking any center will work....

I coment this because altough here in this chair is hot, i prefer to tell to you... HAHAHA
Well, i have memfree, thats not work, close the session works, and restore for a moment, but i prefer to have a option that make the job and not to restore entire session.

I hope in sometime the computers with vacuum aspiration give solution for someones of this problems....