I noticed that with SF 3.2, the fancy new css applied to input fields is not applied to fields with input type=datepicker (or datetimepicker) unless the field is also set as mandatory. Functionally things are fine. Afraid that's the extent of my ability to help.
Topic on Extension talk:Semantic Forms Inputs
I can confirm this but never got around reporting it. I added the following including some other modification to "MediaWiki:Common.css" to enforce the same appearance for datepickers:
/* Semantic Forms Inputs */
.hasDatepicker {
width: 95px;
border: 1px solid #bbb;
border-radius: 3px;
display: inline-block;
margin-left: 0;
max-width: 100%;
padding: 4px 8px;
}
Wow. Thanks kgh. Worked perfect!