Hi all, I got the same problem here. But there's not the only one (the UID / GID problem). The uri of the device is no more usb:/dev/usb/lp0 as It was in previous configuration, but usb://Samsung/ML-1610 for example ...
The usb backend give this url when running without arguments ... I solve the problem by chown lp.lp the dev/usb/lp0 as a short time solution regarding rights issues ... Hope this help Regards, BenoƮt