I am running on sparc solaris 5.5.1. I am trying to execute the Calc class from the test/awt directory with the following command: kaffe Calc I get the following output: illegal Graphics target: 1275068416 illegal Graphics target: 1409224 , and the Frame is displayed empty. I can fix this problem by modifying the java/awt/NativeGraphics.java code and adding two lines of code before line 530. System.out.println(g); System.out.println(""); I am wondering if anyone else has run into this bug, or if it is a problem with my machine.