Comment 14 for bug 55283

No, I don't have the file /etc/cups/pstoraster on my system.

Here the outputs of the commands:
luca@luca:~$ ls -l /etc/cups/*.types /etc/cups/*.convs
-rw-r--r-- 1 root root 1215 2006-05-03 22:43 /etc/cups/command.types
-rw-r--r-- 1 root root 4459 2006-08-08 23:02 /etc/cups/mime.convs
-rw-r--r-- 1 root root 6109 2006-07-11 00:53 /etc/cups/mime.types
-rw-r--r-- 1 root lp 242 2006-07-16 18:09 /etc/cups/raw.convs
-rw-r--r-- 1 root lp 213 2006-07-16 18:09 /etc/cups/raw.types

luca@luca:~$ grep -H "application/vnd.cups-raster" /etc/cups/*.types /etc/cups/*.convs | grep pstoraster
/etc/cups/mime.convs:application/vnd.cups-postscript application/vnd.cups-raster 100 pstoraster

luca@luca:~$ grep -H "application/vnd.cups-command" /etc/cups/*.types /etc/cups/*.convs
/etc/cups/command.types:# Define the new application/vnd.cups-command filetype...
/etc/cups/command.types:application/vnd.cups-command string(0,'#CUPS-COMMAND')
/etc/cups/mime.types:application/vnd.cups-command string(0,'#CUPS-COMMAND')

> Why do you have both gs-afpl, gs-gpl and gs-esp installed? You only need
> gs-esp for printing with CUPS.
Well, I spent about one month looking for a solution to my problem, and I asked for help on many linux forum. So that is the result of different trials to fix the problem, once someone said "try this..." after another one said "try that..." and so on. The last I refused to try was Turboprinting, because I realized that my system was becoming a "printing salad".. do you understand?
Anyway... if you think it's better I can uninstall all that, but I don't know if uninstall packets can cause problems.... I'd prefere to let them there, for sure only if there is no risks of interferences.