One thing that annoys me about vBulletin is that posts in a thread are organized in a linear fashion, when they should really be organized in a hierarchical, tree structure (see Responses are typically directed towards a specific post within a thread, and that's often not the original post or the post just above the response. vBulletin threads make it hard to immediately tell what a post is responding to.

Am I the only one bothered by this?