If a field is configured as a date field, SQLForm adds a pop-up calendar (using the older Dynarch calendar, not the YUI version). However, if the field width and max length are set to 0, the Javascript that gets output contains logic errors (e.g., comparing on empty values).

We were able to overcome this error by setting the max field length and maximum width but would prefer being advised of it before saving the field settings or having SQLForm substitute a reasonable value.