Hmmm, never stops? Does Newsbin work properly, respond to actions? I can't really tell from that screenshot but is it trying to open up a large download queue still in progress?
The heaviest cpu activity I see from NB is par repair, which obviously isn't happening here. Any chance you're running some sort of antivirus? I wonder if it's fighting with newsbin. That's really weird. I take it you tried a re-install?
Newsbin won't do anything else. The program responds but it just won't download things. I'll load up a queue and it'll download like 39 KB and then sit at 0 KB/sec forever even though I haven't paused it.
I re-installed the beta and it still happened.
So then I installed the latest stable over it. That fixed it and the program functions normally.
I added some additional logging to the repair stuff and it doesn't seem to like it. I wonder if that's what's happening here. Probably be another beta out in a couple days with a fix for that.