I just found out, that one of my older Jabaco projects returns an error when compiling a System.out.println statement, that a Class is expected, and the 'out' is highlighted.
Also, when typing System then a dot, it uppercases it to SYSTEM.
I figure this has to do with the order of my Imports, so I explicitly put a
Import java#lang#System
at the top
Similarly for Debug.Print. The class error points to the Print method.