Crashzor i had i very bad day yesterday so the reply from me was actually very polite and i rewrote it several times
But i want to make clear to you that the kind of attitute you are showing right now will get you nothing.. This 'Hey i have a problem, i have no idea about it but i need it fixed yesterday' thing is just annoying. People are reading about your problem and everyone that has posted a reply took some time to help.. either with more information, thinking about it or just by finding a solution. As far as i see none of them in directly involved with the engine itself so we need some time till this problem reaches the right persons.
If you read the posts in here you should have noticed that different people have this high cpu usage problem while others do not have it. So i guess the only correct anser right now is 'its this way on your computer currently so you'll have to live with it'.
You can however try one of the newer engines (servers) from here:
http://icculus.org/twilight/darkplaces/files/ for example this one
http://icculus.org/twilight/darkplaces/ ... 4beta1.zip (currently the latest version). But to be honest i have no idea if it will help. It might even give problems with users that use the 'normal' Nexuiz 1.5. There was some talk about that but i did not follow it too much.. So please test it in case you download and use it.
Once people find time to take a closer look at the problem there might be better answers. Or you can try to go the #DarkPlaces on irc.anynet.org and directly talk to the people that made the engine. BUT PLEASE BE MORE POLITE THERE!!!!!