I am almost sure this isn't a Nexuiz problem but maybe someone here knows how to fix it anyway.
The following happens: the game is running beautifully except for the fact that every now and then the game seems to forget I have held a key pressed. I usually move a lot and it happens that a movement key keeps being pressed down for more than ten seconds with lots of other keys pressed and released during that same time. This keyboard amnesia is especially annoying if I am trying to bunnyhop, the game suddenly forgets the forward movement key is pressed and I slow down or stop jumping at a spot. This is making my bunnyhopping style more silly than it was intended to be (well ok my sponsors might like that but that is not the point).
I checked the keyboard settings and tried to turn on/off the key repetition, but that doesn't help too.
What bugs me most is that the game runs without problems on my Windows installation on the same machine, making me boot up Windows more often than Linux these days.

Any suggestions?
Oh, I almost forgot: the problem appears when running Nexuiz on Ubuntu 8.04 (Hardy).