samba - Jan 2003 - Samba printers: Office stuck while changing text attributes

I experienced problems with a samba printer over Samba 2.2.7a/Solaris 7.
When I change caracters attribute ex: normal to bold, change the colour 
there is an important data flow between the WS and the Server so it 
takes several seconds before the modification became effective.

The printer is a Brother HL 1670 N network printer.
There is no problem to print.
I experienced the same problem whith 2.2.5.

Can any one help me ?

Thank

Pierre