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I've been having an intermittent issue recently on my MacBook Pro: every so often, I'll start getting bad DNS results. For example: I type in facebook.com, and another website loads up instead of Facebook. If I clear the DNS cache with dscacheutil -flushcache, the problem is instantly fixed, but that doesn't stop it from happening again, of course. This happens with OpenDNS, Google's DNS, and my ISP's DNS, so it's definitely not the DNS server. I am at a loss trying to figure out what might be happening. Any ideas?
What browser are you using? Is it happening with other sites too? – Olli – 2011-02-24T08:20:42.210
I had a similar problem once where the way Mac OS X 10.6 was communicating with my wireless router was causing exactly such strange hiccups, in a way that other (10.5) computers on the same network were experiencing the same. Upgrading the firmware on the router fixed the problem. – Asmus – 2011-02-24T09:30:43.657