Eric,

Microsoft recommendation is to have one browser server (computer running as a
browser) for every 32 clients.  Most domains have enough actual servers, so no
clients need to run as browsers.  It's possible that you don't have enough
servers, and the domain controller is directing these computers to run as
browsers.
<http://nitecruzr.blogspot.com/2005/04/nt-browser-or-why-cant-i-always-see.html>
http://nitecruzr.blogspot.com/2005/04/nt-browser-or-why-cant-i-always-see.html

See the Microsoft TechNet article too:
<http://www.microsoft.com/technet/archive/winntas/deploy/prodspecs/ntbrowse.mspx?
mfr=true>
http://www.microsoft.com/technet/archive/winntas/deploy/prodspecs/ntbrowse.mspx?
mfr=true

And Eric, please don't contribute to the spread and success of email address
mining viruses.  Posting your email address openly will get you more unwanted
email, than wanted email.  Protect yourself and the rest of the internet - read
this article.
<http://nitecruzr.blogspot.com/2005/05/how-to-post-on-usenet-and-encourage.html#M
unging>
http://nitecruzr.blogspot.com/2005/05/how-to-post-on-usenet-and-encourage.html#M
unging