Please describe the problem:
Because of #525630, I've still got some failing podcast feeds in my list.  After a day away from the machine, the feeds have been checked and each time a failure occurred, a dialog popped up, so when I come back I've got 10 dialogs I have to spam the OK button on.

Steps to reproduce:
1. Add http://www.pdxcityclub.org/cgi/podcast.pl to your podcast feeds.
2. Wait.


Actual results:


Expected results:
I would expect failure dialogs to not pop up for the failed background downloads, instead having a warning flag next to them in the episode list (which they already have).  Barring that, give me a single dialog warning me about podcast loss, with the entire list of failures in it.


Does this happen every time?
Every day.

Other information: