Posted by asugene on October 16, 2008 at 11:27pm
It appears the latest Date 5.x-2.3 module has a minor conflict when using the "Text Field with jquery pop-up calendar" within Panels 2. It doesn't work at first, you will need to refresh the page to get it to work.

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I found the problem which was buried. Panel 2 panel page >Panel Tab Style > Mini Panel > CCK > Date 5.x-2.3 > using "Text Field with jquery pop-up calendar"