Comment 7 for bug 137409

I confirm 2a). Sometimes, the prev/next actions get stuck.
I've seen 3 and 4, too. But this is only "visual", i.e. if you switch to another feed and back, all should be fine again, right?
It's not about dupe detection, it has to do with the list items (which are created per article). Thus, when switching to another feed and back, the items are cleared and recreated properly.