Thread:Project:Support desk/Issue with new Firefox 9.0.1 / Left Navigation box display UNDER content/reply

This is due to the removal of some old code in firefox (https://bugzilla.mozilla.org/show_bug.cgi?id=679971) but that is getting reverted in Fx10, But if you update your MW install up to at least 1.17 (although 1.18 preferred) It will fix the issue.