Why the hell is my Chat font bold?

[Tuskar]

After two hours of search and try to change the fonts don't know what to do?

The chat font is still bold and not the standard like the font in the combat chat. The bold font makes it hard to follow the chats and annoys me - is it possible to change it?

Thanks for your help...

Tuskar - from Forscherliga (German RP-Server)