Datepicker (1.8rc3) not transferring date in IE6

Datepicker (1.8rc3) not transferring date in IE6

Using jquery-1.4.2 and jquery-UI 1.8rc3, I instantiated a datepicker on a text input with showOn: 'focus'.   The datepicker appears correctly.  However when I click on a date, the datepicker doesn't disappear and the dateStr doesn't get transferred to the text input.  I tried adding an onClose: handler that calls alert(dateStr), and it does not appear that this event ever fires in IE6. Everything works fine in Firefox.   I have Microsoft Script Debugger installed but no script errors were detected.