Well, outside of the RAM preview issues that are stopping me from using AE CC 2014, I decided to at least use it to render a AE CC project already composed in CC.
I shut the CC project opened it in CC 2014 (same computer, same drive) and got the moov file error message. It would not recognize any Quicktime PNG movies, etc.
But the old CC does recognize them. Back to CC!
See this for troubleshooting QuickTime issues:
The permissions issue for the preferences folder seems to be the most common culprit recently.
Already did that. Still the same problem. But they open in AE CC just fine.
I've also re-installed the pro-codecs, checked permissions on the adobe folder in preferences, trashed the preferences, in addition to trashing that DVCPRO component. I also get the message that quicktime is not installed on the system.
AE CC 2014 just doesn't seem to work very well yet.