ashtangakasha,
We just released a new version of the Pololu Library (091201) which is very similar to the last one (091125) except that it was compiled with the latest avr-gcc (4.3.3). The print_long and print_unsigned_long bugs should be gone. You can read the announcement and download the library.
The precompiled hex file for the SV 328 demo program in the new library should work for you. If you use the new library and still have trouble compiling your own program that uses print_long, then tell me what version of avr-gcc you are using (run “avr-gcc --version”).
-David