The demos use the latest version of the controls that is available (Q3 2015 at the time of writing). If there is a difference in the control behavior, there are three possible reasons I can think of:
- The controls you are actually using are an old version. In this case I advise that you upgrade to the latest.
- There is a difference in the control configuration. Compare the demo setup with the setup you have on your end (e.g., StripFormattingOptions, enabled tools, custom code related to the control, etc.).
- Our demos, being an Internet site run in edge mode, while a local site on your end may be running in Compatibility Mode which is not supported and we cannot guarantee proper behavior there. I advise ensuring that the browser is in standards mode, removing local site(s) from the Compatibility View list and adding an X-UA meta tag to put the browser in edge mode.
On a side note - I advise that you also review the following article to get a better overview of how pasting in RadEditor works: http://docs.telerik.com/devtools/aspnet-ajax/controls/editor/managing-content/pasting-content/overview. A key point is that IE11 has its own pasting from Word and RadEditor does not have real control over it.
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