It'd be handy if people could note the exact error they are seeing when reporting it.
ISPs do quite frequently have prtoblems with their DNS routing tables, so an IE Explorer Cannot Find Page message (even when other pages are OK) is likely to be a problem somewhere other than the CA server host.
If you open a DOS window (run CMD) and type tracert
www.clubarnage.com then you will see the route it is taking to reach the web site. If it doesn't even recognise
www.clubarnage.com ("Unable to resolve target system" then the problem is in your ISP DNS routing tables.
If it starts the trace but never reaches the destination, then the problem is with one of the relays along the way. My route to
www.clubarnage.com currently involves 19 hops so there is plenty of scope for one being at fault. Eventually routing tables may be automatically updated to bypass a failed hop but this may not happen for a long long time.
Or it may not be a completely failed hop. The step may simply be very very slow, but your browser times out before a response is recieved. (I believe in Firefox there is a parameter you can configure to adjust the timeout - but the reason that the timeout is there is to prevent you waitig too long for updates, so really changing it isn't worth it - you would get v slow browsing)
And just so y'all know, us mods do not have any sight of or control over the servers. All we can see is the forum, plus an admin area - but this is solely forum admin, not server admin. Any problems outside the forum have to be referred to de management...