When UI Date Picker and Interface are both included into a page in IE, datepicker will pop-up and become transparent. Only the drop-down month and year list will show. You are still able click the dates, but there is nothing showing. I know it relates to the absolute positioning of datepicker_div element which interface is making disappear. Lines 330 - 331 in ui.datepicker.js is where the positioning is where the datepicker_div element positioning is set, but I don't know where in interface.js the error is being created, because interface.js is packed.
Any clarification on this so I can submit a bug tracker to interface people would be greatly appreciated. jQuery 1.2.2 Interface 1.2 UI Date Picker v3.3