Aha! I tracked the problem down to a bad entry in weblogsComData.weblogs. I deleted the corrupt entry and did a "Save As" on weblogsComData.root. Quit Radio, swapped the files and started again. I'm a happy camper once again. 6:53:39 PM Link Google It!
Something weird is going on with Radio and Weblogs.com. This afternoon I noticed that my "Fresh Favorites" was empty. So I did some digging.
My Weblogs page says "Error reading Weblogs.com data file." I dug some more and found that my weblogsComData.prefs.changesURL points to http://www.weblogs.com/weblogUpdates/changes.xml. However if you go to http://www.weblogs.com/ and click on the "XML" button it goes to http://www.weblogs.com/changes.xml (note the missing "weblogUpdates" directory).
Aha! I thought, they changed the URL without telling anyone. Maybe they sent out a root update that I missed. No, my root is up to date. Moreover both URLs appear to point to the same data. Hmm... 3:38:33 PM Link Google It!