I've just come across this article on stuffandnonsense.co.uk: http://www.stuffandnonsense.co.uk/archives/clearing_floats_without_structura... It goes into great detail about how the technique used on positioniseverything.net to clear floats will *not* work on IE7. The horrifying thing is, that this is the exact technique that was implemented in this issue: http://drupal.org/node/78656 Because Drupal 5.0 will be the first release to see the wide scale adoption of IE7 this issue will ideally need to be resolved. Thanks Adam