application/octet-stream in mime.types a comment # appears

Hi people,

I want to send "raw" data to a printer in RedHat Linux AS 4. We have
cups-1.1.22-0.rc1.9.11

I followed the standard procedure documented in thousands of web pages
and groups:

1. in /etc/cups/mime.convs uncomment:
application/octet-stream application/vnd.cups-raw 0
-

2. in /etc/cups/mime.types uncomment:
application/octet-stream

It works just fine !!!

The little problem is that if I change or add or drop a printer, the
line in mime.types IS COMMENTED AGAIN !!! The file is not overwritten,
just THAT line is uncommented. It even keeps my comments, indicating
that I uncommented that line 6 months ago !!!

Any ideas?

Manuel Daponte