It is extremely important that all information be maximally accessible to everyone, even people who use systems different than your own. This is about information sharing, ladies and gentlemen, not about holding someone prisoner. Here are ten simple guidelines I give to people designing HTML to help them avoid unfairly discriminating against people who aren't like thems. This provides optimal accessibility for all.
Some people add emacs and opera as well.
No absolute widths for tables, table elements, frames, or anything textual. This discriminates against people with different sized windows or fonts than you have. I realize that the smallest viewing areas are a something of an inevitable problem with pictures, but you can at least minimize this risk by limiting it to pictures alone, not to text. Doing so means that nothing can be viewed until the whole page is downloaded, which unfairly discriminates against people on modems. Small embedded tables are ok, though.