Hi ghoti,I have checked the 2 tiny mce source files itself, they are different. It was not because the binary and text.One point i missed is the look and view of the editor toolbar was also different.I have also managed to get the version from the help toolbar inside the editor.Basically, one is 3.1.2 which is the working fine, another one is 2.1.3 that got problem.So is there a way to upgrade from 2.1.3 to 3.1.2?kindlly advise, thanks