Hello, I have the following line in my /etc/cups/mime.types uncommented : application/octet-stream so that Windows machine which can use the printer driver can print through the cups printer set up on a CentOS box. But something keep changing the file by commenting out the line. So sometimes printing from Windows would stop working and it the cups error_log I see: E [21/Mar/2006:12:58:34 -0500] print_job: Unsupported format 'application/octet-stream'! I [21/Mar/2006:12:58:34 -0500] Hint: Do you have the raw file printing rules enabled? All I need is usually just uncomment that line in /etc/cups/mime.types and restart cups. So I couldn't figure out what keeps changing the files. Am I not supposed to edit the file directly, or am I missing something else here ? Thanks for any help. RDB -- Reuben D. Budiardja Dept. Physics and Astronomy University of Tennessee, Knoxville, TN