Today while writing a new Mootools class an error occurred. Not a new one, I’ve had this one before.

But how could this happen? Everything worked fine in Firefox en Firebug was very happy with my programming. No errors found.
Today while writing a new Mootools class an error occurred. Not a new one, I’ve had this one before.

But how could this happen? Everything worked fine in Firefox en Firebug was very happy with my programming. No errors found.