Layout Grid Problem

hi guys!

we have a strange problem with footer here

when you select something in search the page is reloaded and footer gets messed up.

after reload css class span4 is replaced by span0:

but if form is posted by GET method it works fine.
can you provide us any hint what is the problem and how to fix it?


ok we havent found a fix so we have changed post to get. EOT.