This appears to come from Mantis's global.jelly, function checkUrl(base) { var url = encodeURIComponent(Form.findMatchingInput(base,'mantis.url').value);

Uncaught TypeError: Object #<Object> has no method 'findMatchingInput'
checkUrlconfigure:384
(anonymous function)
e.targetUrlhudson-behavior.js:339
registerValidatorhudson-behavior.js:344
applybehavior.js:73
(anonymous function)behavior.js:79
Behaviour.applySubtreebehavior.js:68
Behaviour.applybehavior.js:54
(anonymous function)behavior.js:49
window.onload