API Core Javascript Errors on Firefox

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What version?

Firefox 3.6 and Above, I tested in different computers and OS:
Firefox versions 3.6, 4.0, 5.0 and 6.0 on Windows 7, Windows XP, and Mac OS X

Alejandro,

Are you sure these are errors and not warnings ?
Where are you looking ? Firefox Error Console ?

Can you please give us more information on what the errors are ?
(a screenshot would be great)

Are you able to run a simple "Hello World" App ?

Thanks.

They are shown as errors, but they do not prevent the app from working. The errors appear even with the most simple hello world app.

I send you here a screenshot of the error console.

Regards, and thank you for your help.