I use jQuery and draggable from jqueryUI. When I update jQuery from 1.6 to 1.7 clientX and pageX attributes disappeared from event variable. Here is an example:
http://jsbin.com/ezulas/7/edit
If in given example jQuery version is changed to 1.6.4 - it starts working. With latest release - both clientX/Y and pageX/Y are not working. I discovered I can use e=e.originalEvent - but that doesn't seems to be the proper solution.