Im having to use my iPhone to read MC because, regardless of browser on my mac, I get diverted and spat out to brisksearch.com. It's very frustrating. Has somebody from netspace done something to be blocked and that's blocked all netspace users? Have I done something wrong and been blocked?
Now starting to suspect older of my 2 MacBooks as it's all working fine from the newer one. Go figure. (And no, it's not a virus, I downloaded Clamxav and ran it on both, latest defs, not a squeek of malware. The bizarrest thing, though, not one other web site diverts anywhere, but it's been a GREAT excuse for a good hard surfing session ;-)
Find out where the two machines are resolving DNS names to IP addresses from, they _should_ both be using the same DNS server - probably belonging to your ISP or the address of your ADSL or cable router. Sounds to me as though one of your machines is using a DNS server that can't resolve the address and shovels all unresolved addresses off to a search site.