the code of this page, when you hit the "post quick reply" button, tries to access a method called "undefined", which is not there because it's undefined. i guess there should be something like an error handler called "undefined", so that, whenever somethign undefined is encountered, the method "undefined" is called which should do something useful, like dropping the error message, send a mail to the admin, or call the police. however, someone seems to have forgotten to actually write this method called "undefined", or it was misspelled in toe code.