This could be nothing more than someone playing with Photoshop or it could be some legitimate screenshots of an update to HTC’s TouchFLO user interface which is codenamed Manila.
The::unwired did some digging and found that the source of the leak is a blog called “The HTC Insider”. The blog provides a file called manila.1.0.0103.0.release.cab that seems to be an early version of Manila. This is primarily aimed at you hacker types out there as it’s unlikely to run on your device out of the box, but nonetheless feel free to try.
More screenshots are available at the Swiss site Mobile-Devices.ch.
Note: The ‘More information’ link is in German.