I've got to resurrect this thread... This is a major issue. I've searched many threads and not seen many solutions. Previously this would relate to a permissions problem on /dev/usb/usb??? or something similar. Now I am reading about "apparmor". I don't know what it is, but it sounds like some kind of watchdog similar to MacAffee(sp?). If something so major as to start blocking access to devices was going to be installed, it should have mentioned there may be some permissions to fiddle with.

If anyone knows what to do, I have an AMD 64, and Epson CX-4200 on USB that worked great 2 days ago on Gutsy...