[Samba] Windows XP & greyed-out Guest user password prompt

[Jules Agee]

(replying to self)
Jules Agee wrote:
> Hi, we've been using Samba for a while, and are just now starting to 
> switch our desktop computers to Windows XP. We are having a problem 
> where connections to our Samba server fail, and the user is presented 
> with a password prompt asking for a password for user Guest. They can't 
> select a different user.

Sorry, forgot to mention that we're running Samba 3.0.7 on Debian GNU/Linux