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[muzzol]

> What OS and version of cups on the clients?
>

sorry for not giving this info before:


# lsb_release -a
No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu 12.04 LTS
Release:	12.04
Codename:	precise


cups 1.5.2-9ubuntu1        Common UNIX Printing System(tm) - server


on the server side I've tried with 1.3.7 (current on production) and 1.5.2 on testing with same results.


please, dont hesitate to ask for further info.


muzzol