Scroll bar is twice as long as content + scrolling is more continuous than before

Two issues, probably related:
a) Scroll bar is twice as long as content for some pages (I'm using jqm latest). E.g. when one has reached the bottom of the page, the scroll bar is only half way down.

b) Scrolling performs faster than before, e.g. it "continues" without user press (similar to the speed of -webkit-overflow-scrolling:touch; , but without the overscroll elasticity). Previously scrolling on a generic web page in UIWebView stopped when touch stopped.

I am running two versions of my app side by side, one in each version (3.4 + 3.3), so I believe it's a cordova issue, as the content is the same on both.

Edit: Just found this was a specific feature added. Closing this issue until I find out more.