Because I don't follow the online spoiler's and Ron Moore's online info, I didn't know this was going to be such an 'important' episode.
When Starbuck starts (or rather continues) having strange dreams and memories from her chilldhood start coming up during everyday life (while on a mission, for in
instance), people around her, Lee in particular, become worried.
Starbuck is also recollecting events on New Caprica and the cylon known as Leoben. All these aspects combine to make this a startling episode, especially the ending. There were hints throughout the episode about its ending, but I'm not really sure what happened. For some reason, I don't think we've seen the last of her.