Yahoo Pipes and Twitterfeed receive 403 and 503 errors when items are clicked on the RSS feeds fed through them.
Pipes and Twitterfeed worked a few weeks ago so it seems a change was implemented on the Pownce side. Twitterfeed dev has looked into it and it seems Pownce is blocking the twitterfeed domain itself (can't even connect to the Pownce domain anymore to validate RSS feeds).
Are these intentional syndication limitations Pownce has setup or a technical issue that may eventually be resolved?