Given that the rollback system is pretty complex, I'm not sure how one would go about unfixing it once the easy remedies are gone. I for one am definitely not going to try and mess with the internals of the engine so deeply.
I imagine you can try looking for help on the
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or in the Programming part of the forums here.
I've personally given up on rollback altogether. Not hard, since I was taught in the old school of "fuck up and don't have a recent save, enjoy your misery", so my left hand is always hovering over Ctrl+S/Alt+S/F5, etc.
It's surprisingly applicable to work environments too, because not all software is bug-free or well-supported.