just checked the sources of WebViewport.qml, the md5sum of that file has _not_ changed between the PR releases.

The identical functionality for touch/doubletap/scrolling can be found in here http://harmattan-dev.nokia.com/docs/...bview-qml.html

Grob uses the same code. Yes there has been some changes on magnifier functionaly elsewhere between releases, but afaik they are not affecting the default touch behaviour of the viewport. And if by some miracle behaviour has changed by bug fixes and feature improvements, it's still not considered as regression ;-)