The NewLineBehavior only instructs what to happen when Enter is hit. Whereas, pasting content, cannot be modified by this functionality. No matter, what option is chosen, P, BR and DIV are always considered as new lines, but a replacement of one tag to another is not a job of the new line behavior.
As pasting should always lead to an output that is the same as the source from where text is copied, there is no automatic built-in functionality for that. Indeed, the only option is to create a custom content filter (http://demos.telerik.com/aspnet-ajax/editor/examples/contentfilters/defaultcs.aspx
), that achieves the required results.
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