CB field with Editor Text Area problem

Hi!
Iam facing some other issue with Editor Text Field. When I create new field and select "Editor Text Area" Joomla is not savinf the settings - seems buttons: Save - Apply - Cancel do not start any action.. no browser response. Other fields work...

Have you ever heard of this before?

Thanks

-- Attached the Script errors

versions please?
does this happen frontend and backend?

Actually, I am shaming to say, I am using 1.7 RC
But as my collegue tried, he had no problems on saving. Even with other browsers, not on my machine.. so its a local problem.. Thank you for your interesst.