Has anyone noticed any issues with data loss on Windows 8?

Entering some data and suddenly all the tables rolled back to their previous state a couple of hours earlier. No reason that I could see, these were just basic browse windows, all three tables involved seemed to do the same.

It was as if table buffering had been turned on and then suddenly rolled-back but it hadn't.

Has anyone else noticed similar behaviour on Win 8?

Thanks,
Nick