There's something at http://blogs.msdn.com/michkap/rss.xml that sends FeedReader into infinite loop. One FeedReader thread uses 100% of the core for indefinite time. During that the feed checking is disabled.
To repeat:
- Add http://blogs.msdn.com/michkap/rss.xml to the list.
- Update.
- CPU goes to 100% and stays there (if you have multicore machine, one core goes to 100%).
Vista 64, FeedReader 3.13 midrelease #2, running elevated (because it doesn't work otherwise)