IE Question

Howdy.

Been having trouble for quite some time using IE6 (with latest patches). The problem is when I try to go to certain websites, I keep getting the standard “Server could not be located…check your DNS settings…yada yada yada”. If I hit refresh 2-3 times, the error will sometimes go away. If not, I try again later, and the problem goes away.

I clear my disk cache, delete my cookies, etc; Yet, the problem seems to happen with at least one site every day. The biggest problem site being msnbc.com

Is there something I can do mitigate this problem? Like a static DNS entry, or something? Driving me up a wall.