Please try 'Recent Comments' v1.1. It uses the database connect.php file from the Commentics script which correctly sets up the page to display UTF-8 encoded text.
Regarding the 'Reserved Name' check, the script will only attempt to find a match if the name is not UTF-8 encoded. This is because the regular expressions that are used do not work with Unicode by default. However there is a special option for this so I will test it out and let you know if I find a solution.