I think I'm experiencing some kind of local DNS issue. I just noticed today that when I tried to visit www.grooveshark.com, the url is being mapped to 127.0.0.1, because I'm being served by my home web server:
I've had my web server up and running on my machine on port 80 for forever. This is the first time I've ever seen it get served up in place of a site like this. It seems to me as though some sort of ad blocking software is trying to block grooveshark.com by redirecting all requests to 127.0.0.1.
I've heard of doing things like this with one's 'hosts' file, but I've never mucked about with that. I know adblock plus doesn't have a rule for grooveshark. Other than that, all I can think of is that I've recently performed a scheduled update and run of Spybot S&D like I do every few weeks.
> nslookup www.grooveshark.com Server: UnKnown Address: 192.168.1.1 Non-authoritative answer: Name: grooveshark.com Address: 188.8.131.52 Aliases: www.grooveshark.com