After doing all the changes I found a new problem. If I try to send out something with email I recive all mails with coding iso-8859-1 and my german chars are gone. I look in the mail header, yes it is iso-8859-1 and not utf-8.
So I search for this string and found /libs/phpmailer/class.phpmailer.php
I see there a hardcode iso-8859-1 string and change it to utf-8 too. Now my emails still show up the correct way. I have no idea why the phpmailer use the old iso format and not utf-8 in stock installation.
