Note: This should be tested with patch from MDL-25883 and you should have firebug or error console for checking JS errors. Log in as Admin and turn editing on Select a course and add a wiki activity Select wiki activity and add a new NWIKI format page Click on comments tab and then click on add comment Open error console to check for javascript errors Type text and select/highlight text in comment box click on bold icon and you should not see any javascript error. Also '' should be suffixed and prefixed to selected text. Select text again and click italic icon and ''' should be suffixed and prefixed to selected text.