Another problem that I just encountered as well is that I want the both boxes, #side_news and #main_section to both go down until the footer.
In other words I want the content to order the height, but still empty I want both of them to touch the footer box.
I will of course google this now, to try to solve it my self but if anyone knows the answer please tell me ^^.
And yeah, the other problem is still hanging. How do I set them to 250px and 550px without any of them overlapping? What am I doing wrong here?