CUPS receiving blank username

[Lt. John J. Dunbar]

> Lt. John J. Dunbar wrote:
> >> Lt. John J. Dunbar wrote:
> >>> ...
> >>> Thank you for your quick response, Mr. Sweet.  Those lines repeat continuously as long as the print dialog remains open.  The only other thing that appears is the following regular report:
> >> The print dialog isn't answering the challenge, so I'd look for any
> >> changes on that end - GNOME/KDE updates, IP address changes, etc.
> >>
> >> --
> >> ______________________________________________________________________
> >> Michael Sweet, Easy Software Products           mike at easysw dot com
> >
> > The problem is that I'm positive there have been no software updates.  In addition there have been no software updates on the Windows XP machine that also cannot connect to my printers remotely.  There were also no changes do cupsd.conf.
>
> Then verify that your network settings haven't changed - something
> must be different to cause this problem.
>
> --
> ______________________________________________________________________
> Michael Sweet, Easy Software Products           mike at easysw dot com


I have found that somewhere along the line a AppArmor profile in Ubuntu started affecting CUPS.  One problem I'd been having that seemed spontaneous was that I could no long have my default directory for CUPS-PDF be my desktop.  I have alleviated this problem by modifying the AppArmor profile.

However, nothing I have tried has yet to solve this failing authentication issue (I tried disabling Authentication altogether...)

Authentication works fine for HTTP stuff (from the local machine and from remote machines - including windows).  However when it comes to actually using the printers, in Ubuntu the printers don't even show up in the print dialog and in Windows it says that I'm unauthorized.

Does anyone have any experience with issues like this?  What could be causing these failed authentications from so many places?