[cups.general] Problem printing Self-Test Pages

[Bruno Martins]

Good morning everyone,

I'm being unable to print self-test pages on some printers, on my CUPS server (Debian 'squeeze' + Samba 3.5.6).

Error message I'm getting is the following (in /var/log/cups/error_log):
E [25/Jan/2012:08:54:55 +0000] Returning IPP client-error-document-format-not-supported for Send-Document (ipp://localhost:631/printers/Fotocopiadora) from localhost

And also this message in /var/log/cups/access_log:
localhost - - [25/Jan/2012:08:54:55 +0000] "POST /printers/Fotocopiadora HTTP/1.1" 200 281 Send-Document client-error-document-format-not-supported

Through CUPS Web Administration Tool I get:
Unable to send command to printer driver!
Unsupported format 'application/vnd.cups-command'!

My printers.conf shows this info about the problematic printer:
<Printer Fotocopiadora>
Info SHARP AR-M165
MakeModel Sharp AR-M165 Foomatic/pxlmono (recommended)
DeviceURI socket://192.168.0.242
State Idle
StateTime 1327422479
Type 8400916
Filter application/vnd.cups-raw 0 -
Filter application/vnd.cups-postscript 100 foomatic-rip
Filter application/vnd.cups-pdf 0 foomatic-rip
Accepting Yes
Shared Yes
JobSheets none none
QuotaPeriod 0
PageLimit 0
KLimit 0
OpPolicy default
ErrorPolicy retry-job
Attribute marker-colors \#000000,#000000,#000000,#000000,#000000
Attribute marker-levels 25,-1,-1,-1,-1
Attribute marker-names Toner,Waste Toner,Photoconductive Drum,Developer,Fusing Unit
Attribute marker-types toner,wasteToner,opc,developer,fuser
Attribute marker-change-time 1327422479
</Printer>

Is there anything I can do to troubleshoot this? I have read that it's related with a recent CUPS update, but it may be not.

Best regards,

Bruno Martins