Am 31.03.2010 um 19:19 schrieb Lee Passey:

I would argue that one of the most important lessons of the internet is that there is practically no such thing as an "average" user. One of the beauties of well-constructed HTML is that it accommodates itself to /all/ users, not just the mythical "average" user.

If you ever come across a web site where you have a right/left scroll bar (and there are many) you know you have encountered a web designer who's stuck in the desktop publishing world.

I would very much disagree here. Because as you say there is no such thing as the standard user.
Or a standard font of size for that matter. Sure you can define that certain fonts and sizes are to be used.
Yet, does the user have them or what to use them. 
I agree with you in so far that the general design of a page should not require a scroll bar.
Yet, it should show up if the setup a user has makes it necessary. 
My main machine is a 17" MacBook with the resolution pushed all the way up. 
At times I zoom pages or change the default sizes and then the pages go unusable.
because scroll bars do not pop-up of the page is not designed very intelligently.

As far as proofing is concerned, it is actually in the desktop domain and a web-based
domain. So what is wrong with having scroll bars. They become more important in
editing especial if you have multiple views in one window with different content.
You resize the views to accommodate your needs and use the scroll bars when you need
to reach parts you rarely need or use.

I can remember when it was said you need to design your page for 640x480 resolution because
other resolutions were not used that much. Or what you still find this page requires XXXX
to display or display properly. Now that is poor design. 

regards
Keith.