FYI:
In Printerdrake (which I think should be called: mdkprint -- but that's an argument for another time), if you have one printer installed, then you go back in and install another printer and set it as Default, it doesn't. You can even go back in and see that the new printer doesn't have (Default) next to it, an go in and set it again, and it pops up and says it is now Default, but you exit and come back in, and it isn't. The original printer is still Default.
