CKEditor inserts foreign characters in Event pages created using it

These characters - like  à and  - appear in our Event pages. The text is not on the page we created, obviously, right in Civi. See the second screenshot below.
The problem appears to be with the built-in version of CKEditor, see the first screenshot below. This code - Â - keeps getting re-inserted in to the page intro text source on Save after being edited out.
So - not sure why - and not a final fix - but editing the intro text source using Firefox, rather than Chrome, seems to take the weird characters out and not re-insert them on Save, pretty much. See the third screenshot below - the page after editing the source using Firefox, not Chrome.
Here's the CKEditor bug report from four years ago about this issue, it was fixed three years ago...maybe it's time to update the CKEditor version in CiviCRM 4.6.X? Is there a newer version of CKEditor in CiviCRM 4.7.X ?
Here's the Q and A I submitted on Stack Exchange