I'm having her try it today in the one CS6 edit bay we have and seeing if that changes things. It uses the same settings as our other bays, but the version is different.
As for Quicktime, I thought of that (PPro REALLY doesn't work well with Quicktime - dunno why). I haven't tried uninstalling it yet. We'll do that next if we have the same problems on CS6 as well. Thanks for the help and ideas!