Joomla3-Admin-template/joomla-cms — pull request #113 by infograf768 (2012-08-15 09:39:13+00:00)
Title: Installation broken on IE (thank you Dennis Hermatski)

I quote Dennis:
"The issue was that HTML loaded via ajax contained javascript code, and IE can't execute it because the HTML is not yet placed into DOM, so better use native Mootools 'update' attribute"