Yellow text. UGH. You're probably missing a data pk3.
Also the message: "you may have ioqauke3 with a buggy compiler" is unrelated to that. Its just something that happens when you run the current GPP build on a 64 bit system IIRC. Compiling it from scratch gets rid of the error.
I say this because it is fairly easy for me to type. However, I really feel kinda bad about helping you. I really shouldn't help someone who names their thread "please help me plz" in all caps, doesn't bother to post a condump (even though someone in a clan really should know better), and uses bright yellow text.