question on URI redirect

just a simple question:

I was reading the section 7.4.4 Meta Data of the W3C recommendation on HTML
4.01
( http://www.w3.org/TR/1999/REC-html401-19991224/struct/global.html#h-7.4.4)
and come across this Note:
Note. Some user agents support the use of META to refresh the current page
after a specified number of seconds, with the option of replacing it by a
different URI. Authors should not use this technique to forward users to
different pages, as this makes the page inaccessible to some users. Instead,
automatic page forwarding should be done using server-side redirects.

Can someone help me with more details why doing redirection in this way is
inaccessible to some users?  and which specific user agents that do not
support this approach of redirection?

thanks for the advice

cheers
David Choi
Project Manager
david.choi@twc-asia.com
fax +(852) 2529 5488;   tel +(852) 2864 1198

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