It appears to be a charset issue. What charset are you using in the database?
I was able to fix the problem by transforming the text to utf-8 in the code manually. I overwrote the file: /webassist/ckeditor/ckeditor_php5.php in order to fix the problem. I also saved a backup with my changes as: ckeditor_php5_bak.php in case it gets overwritten at some point.
You could have probably also fixed the problem by changing your database charset to utf-8.