Can you attach your /etc/cups/printers.conf?
If your /etc/cups/printers.conf does somewhere contain a line with "Letter" or "letter" in it, delete the line and restart CUPS ("sudo /etc/init.d/cups restart"). Does this solve your problem?
Can you attach your /etc/cups/ printers. conf?
If your /etc/cups/ printers. conf does somewhere contain a line with "Letter" or "letter" in it, delete the line and restart CUPS ("sudo /etc/init.d/cups restart"). Does this solve your problem?