Sidebar showing below content in TwentyEleven

Do not edit the Twenty Eleven theme. It is the default WordPress 3.2 theme and having access to an unedited version of the theme is vital when dealing with a range of site issues.

Create a child theme for your customisations. Once your child theme is active, we should be able to help with the customisation.

Reduce the width of your main content area and add a decent right margin. Try using Firefox with the Firebug add-on for this kind of work.

I encounter this issue only in search results page (I have Relevanssi installed). Occurs in IE 8 and IE 9. I’ve tried every CSS fix I can think of but haven’t found any safe method yet.