I'm glad to track this down and make a fix my highest priority, but I need more information.
What browser are you using? What version? And on what operating system?
Prior to release I test on Firefox, Safari, IE8, and IE6. if you're using any of these I'd ask that you clear your cache and restart your browser and see if that fixes it.
The other possibility is the browser you're using may see something as a syntax error that the other browsers didn't. I've had this happen before and knowing the version information is the only way I can track it down and find the error.