Nice, but it features one if my pet hates - field errors in modal dialogs. This requires the user to memorise a list of errors (4 in this example) but you can't

Nice, but it features one if my pet hates - field errors in modal dialogs. This requires the user to memorise a list of errors (4 in this example) but you can't act on the message until you've clicked OK, and once you dismiss the dialog, you lose the message.