[quote=314492:@Christian Schmitz]Screenshot?
Fonts are installed properly?[/quote]
Hi. I tested the font on the notepad and it works no problem, actually you can see the font works fine, but just gets this weird effect.
What I see here is not a “weird outline” but a shadow. My suggestion is to see if you can replicate this in a sample project and file a bug report in feedback so we can take a look at it. Make sure you include the font file that you transferred to your Pi and the location where you copied the file so we can replicate your scenario exactly.