Same problem here with a Canon Powershot A70 which used to work. Solved as suggested by Chrisecob. I have edgy, edgy-updates and edgy-backports.
-- [edgy-backports] Error in libgphoto2 udev rules https://launchpad.net/bugs/91250 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs