my blog is built by wordpess, content sigle page and sidabar, i used float:left, not use clear:both, but now it dispaly normal on ie7, but does not work on firefox, sidebar does not float on its position, it display on bottom of article content,
I need left is article content, right is sidebar, all height is auto, how to inprove it?
If those floats are nested in the #body div then the 1px border on the #body div could be causing the float drop. The available space in the #body div would be 948px (assuming it is nested in the #wrapper) and your combined float widths with margins and padding are 950px.