My machine is a single CPU (P3) running NT4. I've been having crashes too.

I evolved to 1.4.5 and started crashing a few seconds after startup. I tried the test release #2 but it still crashes.

I download 1.4.3 again, removed 1.4.5 and installed 1.4.3, and it STILL crashes? Whatever 1.4.5 is doing, it's leaving it there even after it's gone apparently. I will do a reboot and try 1.4.3 again and see what happens.