This is a problem I've been having for a while, across many versions of WordPress.
Sometimes, when I click on a link to a target in my blog (a link to a post, a category, a page, etc.) the browser will think that it's loading an RSS feed and asks me what I want to do with it. (My example: browser is Firefox.) The address is what I clicked on, but the page is still treated like a feed (with all the recent posts in feed-like form.)
When I refresh the browser, the page loads as expected, but I've had numerous readers complain about this, so I know it's not just me. I have no idea what I should look for to correct this. Any ideas? (blog: http://averagejoe.cc)