Hi! We want to, once again, look into getting chuck working correctly in true 64-bit. To that end, if you have a 64-bit machine that chuck crashes (more than usual) on, please consider compiling the attached program, which prints the native data type sizes for your system, and email/post the output. This will give us a rough idea of the various size discrepancies that are most likely causing things to crash horribly under native 64-bit. To compile: g++ -o platform platform.cpp To run: ./platform You should see something like: char: 1 short: 2 int: 4 long: 8 float: 4 double: 8 void *: 8 endian: small Copy and paste the output and send it back with the names of your cpu and operating system. Thank you very much! Best, Ge!