Sorry to cross post, but I think this info should be very helpful:
"I found a website that explained that the problem with Leopard is a new method of searching DNS servers. I tried their recommended fix and I'm blazing again.
Why Apple made the change from "A Record" queries to "SRV" queries...
since my last post, I've received several PMs asking me for the link for this DNS fix with leopard. So I think I'll just post it here, if that's kosher:
http://installingcats.com/tag/leopard-dns/
No I didn't try that yet. However, since I placed the opening post, I found a website that explained that the problem with Leopard is a new method of searching DNS servers. I tried their recommended fix and I'm blazing again.
Why Apple made the change from "A Record" queries to "SRV" queries...
Loading web pages on my Mac Dual G5 is painfully slow, maybe 5-10 seconds to load a popular website (like this one, e.g.).
I'm running Safari v. 3.2.3, but the problem occurs with other browsers like Firefox and Camino.
I also have a Macbook Pro connected by ethernet to same router...