I've updated to 4.1.7 today and I've noticed my TODOs and NOTEs are not highlighting anymore. They just appear in the normal comment color and fontweight.
My config.4coder has "use_comment_keywords = true;" as expected.
Is there a particular issue with version 4.1.7 and keywords highlighting or is it just me ?
4.1.7 changed the way configs work (it is more dynamic - you can match arbitrary settings with strings).
There was a mistake and it now uses "use_comment_keyword" in default custom layer.
If you add "use_comment_keyword = true;" to your config it should start working.