[Lilux-help] Trouble with permissions on /dev/parport

Hello, I try to operate an old scanner on the parallel port for some small tasks. I need to give rw permissions on /dev/parport0 for everyone, which I achieved by changing the appropriate line in file /etc/udev/static_devices.txt from parport0 c 99 0 660 to parport0 c 99 0 666 After reboot, the device had the permissions as expected: ls -l /dev/parport* crw-rw-rw- 1 root root 99, 0 2006-03-09 15:30 /dev/parport0 crw-rw-rw- 1 root root 99, 1 2006-03-09 15:30 /dev/parport1 crw-rw-rw- 1 root root 99, 2 2006-03-09 15:30 /dev/parport2 crw-rw-rw- 1 root root 99, 3 2006-03-09 15:30 /dev/parport3 However, starting xsane failed (with error-message "No devices detected"). Checking again the permissions on /dev/parport returned: crw-rw---- 1 root root 99, 0 2006-03-09 15:30 /dev/parport0 crw-rw-rw- 1 root root 99, 1 2006-03-09 15:30 /dev/parport1 crw-rw-rw- 1 root root 99, 2 2006-03-09 15:30 /dev/parport2 crw-rw-rw- 1 root root 99, 3 2006-03-09 15:30 /dev/parport3 The rw-permissions on parport0 have disappeared for everyone !! chmod 666 /dev/parport0 brings back the permissions, which allows me this time to start xsane and to operate the scanner. Does anybody have an idea why xsane changes the permissions on /dev/parport0 and , even more important, how to make it permanent? Btw., commands like SANE_DEBUG_MUSTEK_PP=128 scanimage -L also change the permissions, so I guess that it's scanimage or sane-find-scanner that affect the permissions when xsane uses them while probing for scanners. Thanks for your input. JJ Mouris