For the past couple of days it seems that I have to hit the refresh button in order to connect to some websites. The strange thing is that it happens only about half of the time. I'll try to connect, and then I'll get the "Page cannot be displayed...Cannot find server or DNS" error".

I'm using IE 6 / SP2.
I've done a spyware search and all is good there.
As far as I know, I haven't made any changes to my firewall and browser settings.

Any suggestions? Thanks!