Figured out the problem with Datepicker and ComboBox not working (not closing correctly) in IE 8.
You must add the CSS:
I stumbled on this from a previous poster saying that example.css fixed his problem and just drilled down each element until it broke again. This was the trick to making the DatePicker open/close correctly (as well as the ComboBox) in IE 8.
Unfortunately, this breaks more than it fixes ... with my page not reacting right when I have a long list to show (the scroll bars don't show correctly to scroll down). Any ideas on how to fix this with IE 8? It works with every other version (IE7, IE9, Chrome, FF).
Nevermind, apparently I copied over your height for html also from example.css which was completely messing up the vertical scroll bar. After removing the below css rule, everything works as expected.