Checking out the source files and rebuilding is not 
guaranteed to build a program database (pdb) file that 
represents the distribution python DLL. This may be due 
to a differences in the windows version or visual studio 
service pack on my system vs the one used to build the 
distribution, but tracking it down can be very time 
consuming. Including the pdb in the distribution should 
be trivial and avoid this problem entirely. Although I can 
fix the problem for future releases of our product, I am 
also supporting previous releases that included the 
standard DLL included in the distribution.