Re: 2.6.10 Kernel "Invalid module format" error
From the nvidia-bug-report.log file:
nvidia: version magic '2.6.10-3 preempt K7 4KSTACKS gcc-3.3' should be '2.6.10-3 preempt PENTIUM4 4KSTACKS gcc-3.3'
It looks like the configuration of the kernel source tree you're building against doesn't match that of the running kernel (i.e. K7 vs. PENTIUM4).