This is not Adobe. We are Premiere Elements users who try to help other Premiere Elements users with their Premiere Elements workflow. So if your goal is as stated
I'd value any help, especially an official Adobe response.
There is no official Adobe response here. You would need to contact Adobe direct for "an official Adobe response".
You can file an Adobe Feature Request/Bug Report Form but you are unlikely to get a response. And, it probably says that in the information at the site to which the link takes you.
We can offer you input based on change of details if you wish to proceed.
How many computers are involved in those 3 Vimeo movies....
a. Premiere Elements 11 and 12 on one computer
b. Premiere Elements 11 and 12 on different computers
Could you post a screenshot of the Publish+Share/Computer/QuickTime, showing preset selected as well as the all the Export Setting under the Advanced Button/Video Tab? Also, please verify what the specific project presets were for each of the projects involved.
Have you used the Publish+Share/Computer/AVCHD, with presets = Vimeo HD as a comparison for the QuickTime in 12 and 11?
Add On..basic drill questions...
a. Latest version of QuickTime installed with computer with Premiere Elements?
b. Are permissions in order with computer with Premiere Elements 12 - that is a particular requirement of Premiere Elements and QuickTime.
Thanks for clarifcation on the board. I did submit a bug report too...
Regarding your questions.
All three videos were exported using the same computer.
Screenshot of PE12:
Screenshot of PE11:
QuickTime is up to date. I have both the latest QT player and QT Pro.
I don't know about the permissions thing... I haven't set/changed anything, nor have I gotten any error messages or warnings. What permissions need to be set?
I haven't compared other presets... just the custom set QT values.
Thanks so much!