We expected some problems from blogroll matches, but may have
underestimated the impact on searches using the link: operator or
where the query matches a blog or blogger's name.  We do expect to fix
the problem you're seeing.  We'll use the full page content, but
exclude the content that isn't really part of the post.  I'm not sure
if we'll be able to make the change before the end of the year, but we
are working on it and are pretty confident that it can be solved.
We'll post an update here when we've got a solution.