if about 40% of web users are at 800x600 and abou4 40% are at 1024x768. won't i be alienating some of my viewers? if they resize their window slightly, everything is great. might a message expressing this, save my design?
Most people either ignore (best case) or get irritated if you ask them to change their browser to suit your design. And as I said above, just because someone is running at 1024, that doesn't mean full screen, no hotlist, same toolbar setup.
Screen resolution does not measure available space.
If you have a ton of development time in on this design, I'd give thought to opening a pop-up window, sized precisely the way the design requires.