Modules floating to bottom of page on one menu item page

I cant spot why my right column modules are floating to the bottom of page, only one one sigle k2 category menu item page. They were working fine, but apparently something that I did or a news item but, or whatever, is causing them to float, as when you use the "clear left" option in CSS or so.

Anyway, they work fine in all other pages, they appert where they should. What could be causing this problem?

Hi,
without url I can't help you Please give us url to your site with issue.

http://www.tenisdemesasur.com/index.php/por-los-clubes

Did you add some html code into your article ? Becasue on this page div's tags aren't properly closed. Right column is inside Content and should be outside of this. If you check this ulr with this W3C Validator http://validator.w3.org/ you will see that there is one extra diiv tag.

I just spotted div tags inside my article item in that section wrapping the <p> tags. That was the problem. Deleted them and now all back to normal. Maybe when I copied the info from the source, came with div tags and did not notice. Thank you anyway. Problem solved.