As you may have noticed, if you are a subscriber to the VRT blog. We've moved the VRT blog from the blogspot.com domain onto the snort.org domain.
Their new link can be found at: http://vrt-blog.snort.org. All links to the blogspot URI will redirect to Snort.org properly and RSS feeds should be unaffected.
However, if you link to the VRT Blog from elsewhere, this may be something you want to change your link on, so that your links point correctly.