Has anyone seen occurrences of the SharePoint 2010 RSS Viewer web part failing to complete loading when the page loads, instead remaining in constant "loading" mode with the Ajax indicator showing? I've seen it happen in several places now and haven't been able to identify what is causing it.
The RSS feed URLs aren't anything unusual, typically just BBC News or similar and definitely valid and working, it's just the web part which won't refresh.
I did ask about this on Twitter and got one reply suggesting it might be to do with sites where Alternate Access Mapping is set up but that doesn't seem conclusive for all instances I've seen.
Would be interested to hear if anyone else has seen this and if you ever resolved it
UPDATE 23 December: OK, can now see where/when the problem occurs. The problem pages are standard Team Site WIKI pages and have both the RSS Reader Web Part and the Status List (KPI) web part. As soon as I remove the Status List webpart the RSS Feed refreshes without problem. Add the Status List back and the RSS feed doesn't refresh. Again, would be interested to hear if others can reproduce this. I'm guessing that both of these webparts use AJAX and some form of UpdatePanel and there is a conflict.