okay you are right.. nothing is jumping out at me... the only difference is that yu are running pgp 5.03 and I am still running 4.3.10..
I am enclosing a GD Test program I use from time to time to test alot of the functions in the image package.. load it into the main html directory and run it like
http://www.yourdomain.com/gdtestjust make sure to chmod the output dirctory to 777
let me know what happens