For example, trying to reach this forum, we get:

Error 403

We're sorry, but we could not fulfill your request for /forum/list.php?_ on this server.

You do not have permission to access this server.

Your technical support key is: 3a07-7425-17f4-e8c8

You can use this key to fix this problem yourself.

If you are unable to fix the problem yourself, please contact boisso at users.sourceforge.net and be sure to provide the technical support key shown above.

But fear no more! Try this User Agent String:

Browser sniffing is dead.  Move on.  The nature of Son Gokū is...  Irrepressible!!!!

This seems to work on every site that objects to {unknown|K-M} browsers!

Gordon.

____________________
Understanding the scope of the problem is the first step on the path to true panic. [Florence Ambrose, "Freefall" 01372 January 22, 2007 http://freefall.purrsia.com/ff1400/fv01372.htm]