[Dave]

Originally Posted by KGodel

This is a good question. I have an additional one: is there a way to align it to the bottom? Right now the signatures are in the middle of the content area which looks a bit awkward.

I'm not entirely sure what you mean, but you could set a min-height to the .postbitlegacy .postrow.has_after_content class and change it to your needs.
What this does is that it forces a minimum height, and once a post reaches a height that's more than the min-height, it will automatically stretch with the content.

Example:

PHP Code:

.postbitlegacy .postrow.has_after_content{
  min-height: 300px;
}