[development] New clearing technique in 5.0

[Adam Cooper]

I've just come across this article on stuffandnonsense.co.uk:

http://www.stuffandnonsense.co.uk/archives/clearing_floats_without_structural_markup_in_ie7.html

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