Google recently confirmed that the search engine is in the process of fixing blogroll issue and will continue to use RSS feed to index the pages. At the same time it will try to exclude blogrolls and navigational elements of the blog as well.
The biggest issue under this aspect was that if you conducted a link command in blog search, such as link:http://www.pagetraffic.com/seo-blog/, Google Blog Search started to show blog posts that do not have any connection with your posts. Why?
It was due to the fact that a lot of blogs out there have this particular blog on their blogroll. But according to Google, that post should have a link Ă˘â‚¬Ĺ“withinĂ˘â‚¬Âť their post!
Now Google Blog Search is making certain changes to improve. What has Google really changed? Jeremy Hylton of Google Blogsearch said:
The basic approach is to analyze each blog to look for text and markup that is common to all of the posts. Usually, these comment elements include the blogroll, any navigational elements, and other parts of the page that aren't part of the post. This approach works well for a lot of blogs, but we're continuing to improve the algorithm. The search results should ignore matches that only come from these common elements. The indexing change to implement it is deployed almost everywhere now.
Forum discussion going on at Google Groups. So if you have any kind of issue, let Google know about it! This is the help they are asking from you!