Hi Ryan,
To protect users' private information, unprivileged scripts cannot invoke the Cut, Copy, and Paste commands in the Gecko browsers, so the corresponding RadEditor's buttons on the toolbar just notify the user to use Ctrl + X, Ctrl + C and Ctrl + V in FireFox.
Safari however presents itself as a browser which supports the paste command and for this reason the Use Ctrl+V message is not appearing in this browser.
To fix the problem you can use the following code:
Best regards,
Rumen
the Telerik team