Add some more sites that do not work:
http://ezinearticles.com/
http://www.scifi.com/rewind/?sid=870861 (None of the videos play)
http://en.allexperts.com/
Neither work in Firefox or Safari under OS X. All work fine in XP.
Does no one have any more suggestions for this? I tried plugging my modem directly into my Macbook, but it still doesn't work, so it's not the router. I also tried pinging all of these sites, but they all time out immediately (literally, right after I press "Return"). It's like it's not even trying to contact the site before it times out. Since others are having the same problems on the same sites, I doubt it's our ISPs blocking them, either.
There is clearly some bug in OS X networking that is preventing seemingly random sites from loading, as like I said earlier, all the sites work fine under Windows XP (both Bootcamp and Parallels). This is (barely) tolerable now, but once sites I actually visit on a regular basis stop working in OS X, I'm not going to be a happy camper.