[validate] Form is sended even with validation errors

[rabusmar]

After clearing the value of a field in the program the form can be sent once with validation errors, even if I call the valid() method.

I've prepared a small page to see this. To reproduce the error, you have to click the "cancel" button and then send the form by pressing enter or the submit button. You will send the form once, but in the following attempts the form won't be sent.

[john]

Please file plugin bugs with the appropriate author on their bug tracker.