mootools/slick — pull request #67 by arian (2012-02-05 21:14:45+00:00)
Title: Fixes MooTools issue #2248 -  Slick.contains(document, el); failed in IE

IE8 supports document.documentElement.contains(), but not document.contains().
Without mootools this would result in a 'object does not have this contains method'.
MooTools adds document.contains, which resulted in an infinite recursion loop.

Also see the original ticket https://github.com/mootools/mootools-core/issues/2248