[jQuery] Form elements able to be deleted by user? [validate]

[jQuery] Form elements able to be deleted by user? [validate]


I'm using the jquery.validate plugin to validate an email address in a
login form and I have seen a weird bug which I was wondering whether
anyone else has seen / fixed?
I entered a invalid email and the validation error message was show as
normal however, I could delete the error message and also the email
text box! The result was the form was not able to be submitted.
Unfortunately, I was unable to reproduce the problem after seeing it
the once.
Info:
Jquery: 1.3.1
jquery.validate.1.5.1
Browser: IE 7
Relevant code snippet:
<code>
    // Use JQuery.validator to validate login/registration popup form
    $("#f2").validate({
        rules: {
            txtRemail: {
                required: function() {return $('#optR').is(':checked');},
                email: true
            },
        },
</code>