There's a huge thread on the post about the way Chrome has changed its behavior with RSS feeds.
A recent comment by Navarr Barnier says that Chome only triggers the new behavior for files with type application/rss+xml, and not for files with type text/xml.
He's got a point. Here's a file I uploaded to S3 with type text/xml. It didn't bring up the crazy dialog that tries to send me to the Chrome store. I got a stylization of an RSS feed. Not exactly what I'd like which is the feed looking like XML.
Here's the same file uploaded with type application/rss+xml. And sure enough it brings up the dialog.
The moral of the story is if you can set it up so you serve your feeds with type text/xml, you can circumvent the breakage in Chrome. The question is, should we do this. I'm not convinced it isn't asking for more breakage from them.