on submitting a form which has a mandatory checkbox which is not checked, the error is displayed in the messages box at the top, but the 'error' css class is not applied to the checkbox so it is not marked red. This makes it hard to find which form element caused the error.
Comments
Comment #1
adshill commentedCan confirm this...
Comment #2
quicksketchThis is a core bug: #222380: No error highlighting on form checkbox or radio input types and #44933: move checkboxes error class to parent div, so that checkboxes can be given a red border like other fields.