Google Analytics

Google Analytics is awesome, it keeps track of all visitors to your site, and how long there were on your site, and which pages they viewed on their site. With all the goodness that Google offers, there is however one small bug in the system. The function 'urchinTracker' is apparently 'not defined', but this error apparently ONLY comes up in Firefox. If anyone knows how to 'fix' this, please post in the comments and let me know!