Do you need quicktime to export out zbrush movies? I tried to export out a history based timelapse and got that error. Also the history seems to be independent for each subtool which works well for actual work, but looks awful in movie format. I had a eyeball float in the model the entire time without it showing its sculpting or painting.
I would ideally like to avoid installing quicktime since it always tries to force itunes on you, and the updater is annoying. Quicktime has always been buggy for me on Windows.