I saw it too!.
Hello sir, I am part of the team responsible for the error you saw. We had accidentally kept a line of code that displayed the loading % text on the stage. However, the relevant textfield displaying the loading % was removed in the final version of the page and users with the debug version of the Flash player received an error when it couldn’t find the textfield instance. Please accept our apologies for any inconvenience. The files have been fixed and the page should be updated very soon.
Everyone os us make a mistake soon or later, practice makes perfect 🙂
We learn from mistake.
One more reason for Adobe to enable the ability to intercept errors (http://bugs.adobe.com/jira/browse/FP-444) in the Flash Player.
I saw it too. Good Presented Flash CS4