Well, I don't know how much of this is related, but the config file that you've linked to isn't the one that generated the log that you linked to.
Your config file has the Driver "nv" line, and the Load "dri" line; both of these should be gotten rid of (and Driver should be changed to "nvidia"). However, in your log, it seems that you are using Driver "nvidia" -- at least, the log shows nvidia_drv.o loading.
However, the log also shows "(EE) NVIDIA(0): Failed to load GLX". When you edited your config file the first time, did you add a Load "glx" line in the Modules section?