It maybe your version of Netscape, judging from the icon in the Title Bar, I would assume you are using a 4.xx version of Communicator. I am using Netscape 6.2.3 and I see things exactly the same as I do when I use IE. Perhaps upgrading would help, its entirely possible the forum software uses w3c techniques not introduced into Netscape until the 6.xx genre. As for the page loading, it's about comperable for me.

Hope this helps!!