I missed this post from Redmonk guy Cote a couple of weeks ago - apparently, he got torched by the old "hotel redirected all my feed urls" bug:

I've been curious over the past few days why Vienna hasn't been pulling in new items from my feeds. So, I just went to dig around for more info, and was horrified to find out that all the URLs for my feeds -- you know, 100's of them -- to the "register for WiFi" page for the hotel. That is, I'm going to have to go track down all the URLs for the feeds and fix them.

It amazes me that there are aggregators left that fall prey to this. I got bitten by this in BottomFeeder a couple of years ago, and I promptly coded a check for it:

• Cache the old feed for any permanent redirect
• If we get more than a handful of redirects, and they are all to the same url, restore the cached urls and go offline

That's saved my bacon more than once since.

Technorati Tags: rss, syndication, redirect