It seems that the files on the NVIDIA site are faulty. I downloaded it via 3 browsers (IE, Opera, and Mozilla) on Windows and 2 (Netscape 7 and Opera) on Linux. All resulting downloaded files report wrong md5sums. (Same goes for the tar.gz file)
I think this is the cause of the Segmentation Fault I have been experiencing when ever I try a rpmbuild --rebuild.