Unfortunately, you cannot override "remove_script_host" because it is hardcoded in umbraco.editorControls.tinyMCE3.TinyMCE:
Line 250: config.Add("remove_script_host", "true"); .
And when you add a new value to the configuration file - you will get "true, false" instead of "false" , because of the NameValueCollection it is used.
And as we know, when you add 2 elements with the same key in NameValueCollection, as a result you will have a concatenation of these two values with a comma separator .. p>
Therefore, do not waste time figuring out what is wrong with your "remove_script_host" configuration.
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