[jQuery] [validate] Duplicate error msgs (and no re-validation) in FF/Opera. Works in IE6/7

[jQuery] [validate] Duplicate error msgs (and no re-validation) in FF/Opera. Works in IE6/7


I'm using the Validation plugin - http://bassistance.de/jquery-plugins/jquery-plugin-validation/
In IE6/7, it works fine.
In FF/Opera, there are two (possibly related) problems:
1) If I submit the blank form, the validation seems to work. All of
the required fields have the error message appended to them as they
should. However, if I submit again, a 2nd, duplicate error message
shows as well. This can be repeated indefinitely.
2) If I change the data an in Invalid input field, the error message
does not go away.
Screenshots:
Form: http://i41.tinypic.com/29fw8ch.gif
After 1 submit: http://i41.tinypic.com/30i9nhl.gif
After 2 submits: http://i43.tinypic.com/24wwy7m.gif
Code:
http://pastebin.com/m6e59dcaf
Thanks!