fourm posts

The issue I am asking help with is in regards to the individual forum posts. When a user reads a post, the initial post is situated at the top of the post box, with the responses/comments in colored boxes towards the bottom of the page. The origional comment box seems to be of fixed height. This isn't a big deal when the post is long. However for short posts, there is a distractingly large amount of white space before you find the comments at the bottom.

My question: Is there a way to make the individual forum posts a fluid/unfixed height so that they adjust depending on the length of the post? This fluidity of box height seems to be a feature of the rest of the site, which I like. I was just wondering if there was a simple way to make it so for the forum posts.

Thank you for your attention to this matter