My companies ugly homepage (http://www.systembureau.com) is displayed wrong by the M3 Layout engine: the background is wrong, and the href targets do not work. Perhaps even worse, after visiting this page, the apprunner refuses to show the vertical scrollbar or scroll at all (using cursor keys), even on other sites. (I don't really mind that the page is not displayed correctly - in fact, most of the engineers cheered when they heard about it - we would be happy to ask the management whether mozilla.org is allowed to use it as an example of an ugly page with far to many frames and javascripts)

Seems okay with the latest build

Fixed in March 24th Build.