Why printing from Maverick towards a 1.4.x CUPS running on RedHat won't work? Used to work, not anymore once upg to Maverick

Hello everyone,

Recently upgraded to Maverick just to discover that we can no longer print to CUPS. We have the following config

Maverick --> CUPS 1.4 (RHEL 6.x) (RAW Queue) --> Lexmark 460dn

^ ^

Windows_______| |

|

Linux WS _______|

Both windows and Linux can still print through CUPS and so do a bunch of Mountain Lions or even older OSX installs. Maverick though will put the printer into an endless gibberish print mode (gotta reset the printer). Tried deleting and adding the printer again; bringing in the latest drivers from Lexmark; install a new generic printer, both PS and PCL; install from the CUPS web interface; install a different CUPS 1.5 on a different Linux box and share the very same printer; neither made any difference.

Hooking Maverick directly via USB will print and the CUPS 1.4 acts just a simple "pass the buck" because of the RAW queue definition, so anybody with a hint?