The month date picker example that is in http://www.telerik.com/community/code-library/submission/b311D-mdkhb.aspx
set up for prometheus throws an error on picker.get_calendar(); line
var picker = $find("<%= RadDatePicker1.ClientID %>");
var calendar = picker.get_Calendar();
the object doesn't support the method. This is with the new verision (released Prometheus), before release it didn't do that.