In Usenapp 0.92.3 (build 266), space-bar no longer selects next unread post.
I was just coming to log that too 🙂 Set to 'next unread article' here. Middle-mouse-button likewise inactive. 'n' still works fine.
Fixed in the v0.92.4.
Click "Check for updates" to download the update.
Yes - the update panel appeared but was hidden behind a window. So I assumed it had updated to the latest version when there was yet more to do.
I see these versions remember the window positions, which is nice, ta.