On 1/31/07, Mike Miller <mbmiller at taxa.epi.umn.edu> wrote:
> Is it possible that Linux machines don't identify as such?  I don't know
> why a machine would give it's OS to a web site!  It seems like a bad idea,
> so maybe Linux users avoid it.

Web browsers generally identify their OS to sites they browse via the
user agent string.  see
http://en.wikipedia.org/wiki/User_agent#Example_user-agent_strings.
If you use firefox, you can see what your browser is reporting itself
as in the help>about box.
I doubt that user-agent spoofing or hiding has much of an impact on statistics.
-- 
jonner