Vienna Version 3.1.11 :2aa3b6bd:, macOS 10.12.5, MacBook Pro Retina.
Using the two finger gesture on the trackpad to scroll up and down through a post (bottom right pane) or the list of subscriptions (left pane) works correctly until the two fingers are released. If there is any 'residual' scroll from moving fast at the time of the release, the window being scrolled through immediately stops where it is and the list of posts (upper right pane) begins scrolling in its place.
An RSS/Atom newsreader with features comparable to commercial newsreaders.
2 posts • Page 1 of 1
And of course as soon as I post that having poked around trying to find if anything affected it, I quit and restart and the problematic behaviour has stopped...