Well, I have trouble doing screencasting with games in wine...
lines apears on videos and screenshots (using de gnome utility for that)
using this tutorial (http://ubuntuforums.org/showthread.php?t=1392026) or any other program for this (like gtk record).

My PC:

C2D e7400
GeForce 9800 GT
3Gb Ram
Ubuntu 10.04
Nvidia drivers 256.44
Wine 1.3.0
Last Updates.

example vídeo: http://www.youtube.com/watch?v=2pdF_aOPiUk

With K/Ubuntu 9.10 and Kubuntu 10.04 ( 3 or 4 months ago did not have this problem)

I tried dif. drivers, and wine versions and changing the refresh of the games and nothing ;(