GetCallingLibrary is removed as a public symbol. Use Resolve() instead.
<datetime> fields of type date no longer accept storeutc, i.e. they will always return a DATETIME value with the selected date and time 0:00 and setting a DATETIME value will only set the date, ignoring the time. On development, test and acceptance servers, setting or getting the value of a <datetime type="date" storeutc="true"> component will throw an exception.
forms.whlib now rejects updates to disabled fields, just like normal HTML5 forms. You can set up a whitelist regex to allow
certain disabled fields to be overwritten or even get the old behaviour back by setting this->formsubmitdisabledregex := ".*";
in your form's NEW(), but you need to guard against users trying to modify the disabled values.