Strange Datefield Behavior in Internet Explorer
I was having a problem with the fieldbox in a cfinput type="datefield" when using Internet Explorer. The calendar was hiding behind the field (not to mention some other strange sizing behaviors). I found this solution at StackOverflow:

Well, you have to encapsulate your datefield within a div with both position:relative and Z-index value, as in :

<div style="position:relative; z-index:3">
<cfinput type="dateField" name="info_dateDebutPub" value="#dateformat(info_dateDebutPub,'dd/mm/yy')#" mask="dd/mm/yy">