Thanks for the followup. I've been trying to recreate the problem this morning: placed ai, svg and eps files of varying sizes, created text, shapes and objects using the internal tools, filtered, and finally got the problem to randomly occur again (I know how software engineers love the random bug). Here are a few more details: the symptom locks to the file, if a different document is also open, that document retains normal behavior while the problem document continues to lock to the hand tool. Saving the problem document, closing it and re-opening it usually clears the issue. Unfortunately, since the problem does clear, I can't really attach a file that will demonstrate what is happening. I did also attempt to create a problem using keyboard shortcuts but to no avail (good news, eh?).
Not complaining, just trying to help debug (I support production hardware and software at the University level and am trying to find reliable alternatives to the Adobe stranglehold on the print production market. Graduating students can at least be advised regarding tools that might help them as freelancers without ending up in eternal servitude to the Adobe system of licensing and pricing).