Avatar Crop Tool

I recently read that new bug fix release of elgg 1.8.1 beta has removed existing issues with avatar crop tool. But i still have a problem with avatar crop tool. I updated to beta version of elgg 1.8.1 using a facebook theme and tested on opera, ie9, firefox and chrome but avatar crop tool does not function. My link is http://www.pak4u.com/pakbook. Please help out.