You can see a large gap between the end of the content (actually after the filed under and leave comment links) and the related content, but ONLY on the first post of each page.
On the single posts, the gap appears after the "share this" widget.
The problem started today when I installed the related content widget, BUT I had this problem before on the single posts right before the comments.
I double checked the tags and they're all right as far as I can tell.
main page: http://angiegoboom.com
single page example: http://angiegoboom.com/2012/04/2-awards-aka-massive-link-love-post
Here is my main page code:
And here is the single post code: