I found a discussion of this "problem" in the Samba documentation:

http://us1.samba.org/samba/docs/man/Samba-HOWTO-Collection/classicalprinting.html#id390974

Basically, we were setting up double sided printing in the via:

Start->Printers and Faxes->right-click printer->Properties->General 
tab->Printing Preferences...

And it was working!


We should have been setting it up via:

Start->Printers and Faxes->right-click printer->Properties->Advanced 
tab->Printing Defaults...

Something about the new Samba release forced this change.



Owen Beckley wrote:
> What is the best way to back out the samba update that came through on 
> 11/16?
> 
> Owen Beckley wrote:
>> My users just noticed today that the "double-sided" setting for their 
>> printers will no longer stay saved. All of our printers are spooled 
>> using cups through samba on SL 4.5 from WinXP clients.
>>
>> There was a samba update on 11/16 to version 3.0.25b-1.el4.2. Has 
>> anyone else noticed any problems.
>>
>> Here are some more details...
>>
>> On WinXP, if you go into Start->"Printers and Faxes", right-click on a 
>> printer, and choose "Properties" you're provided a dialog that lets 
>> you set the default properties of your printer for all applications. 
>> For most 2-sided capable printers, you need to first tell the driver 
>> that you have a duplex (double-sided) option installed. Then you go 
>> the the "General" tab, click on "Printing Preferences" and on a new 
>> dialog, you say that you want printing on both sides. If I click on 
>> "Flip on Long Edge" the dialog will show that two-sided printing is 
>> now set up. Clicking on "Apply" and the "OK" eventually gets me out of 
>> the dialogs. If I go back into "Properties" for that same printer 
>> again, the "Flip on Long Edge" option is no longer chosen and the 
>> setting is back on "None".
>>
>> At first I wanted to blame a WinXP update for the problem. To show 
>> whether or not WinXP was at fault, I added one of the printers 
>> "directly" to a TCP port bypassing the samba (or any other) server. 
>> When I change the printing preferences on that printer, the "Flip on 
>> Long Edge" attribute stays selected.
>>
>> Any help would be truly appreciated.
>>
> 

-- 
Owen Beckley
Clarity Communication Systems