I don't know if this is related, but several people (myself included) have had problems with JavaScript errors in the ads at the bottom of the pages. (Reportedly IE is somewhat more tolerant of them than NetScape.) If you turn off JavaScript in your browser the site stabilizes. In Netscape 4.x, choose Edit>Preferences, scroll down the categories at the left to Advanced, and uncheck Enable JavaScript. In other browsers, I don't know.

I can't imagine your modem causing a problem with this site but not others.