Comments Don't Show on Homepage

Community Server 2007 version 3.1.31113.47.  New blog posts, pictures, or forum posts will appear on the homepage but blog comments will not and I can't figure out why.  The following is code from my home.aspx page, which I know is being hit because I can change the page size to 10 posts and see the results immediately.

Any ideas on why comments aren't showing?  I upgraded CS from an earlier version which displayed comments fine.  Everything else works.

protected override void OnInit(EventArgs e)
    {
        List<IndexPost> recentPosts = CSCache.Get("HomePageSearch-" + CurrentCSContext.User.RoleKey) as List<IndexPost>;
        if (recentPosts == null)
        {
            SearchQuery query = new SearchQuery();
            query.StartDate = DateTime.Now.AddDays(-100);
            query.EndDate = DateTime.Now.AddDays(1);
            query.PageSize = 5;
                        query.ApplicationTypes = new ApplicationType[] { ApplicationType.Forum, ApplicationType.Weblog, ApplicationType.Gallery, ApplicationType.FileGallery };
            recentPosts = CSSearch.Search(query).Posts;
            CSCache.Insert("HomePageSearch-" + CurrentCSContext.User.RoleKey, recentPosts, CSCache.MinuteFactor * 5);
        }
        RecentPostList.DataSource = recentPosts;

        base.OnInit(e);
    }