I changed the DNS on one of my sites about a week ago, and 99% of my traffic is now viewing the site on the new server, however me and one of my business partners still see the old server when we go to the site. When I look over at the new site I see 600 users online, then I check the old server and I see just me and maybe two other people. I have cleared my cookies / temp files but that doesn't seem to do anything. Anyone know what the problem might be? Usually when I switch my domain's DNS I see the new server within 1-2 days.
Could well be your upstream DNS servers are still serving stale records. There's an article I wrote on avoiding the effects of these problems (if not the problems themselves) here.
give more details... are you editing the dns record or is it like a host? what is your refresh set at?
if you and your partner are accessing the site through a router, trying rebooting the router. This happened to me once and dns wasn't updated until the server was rebooted. RC