Hey
Quartus automatically during compile promotes the CLK signal to a global. I tried manually doing it where you instructed and its not as you describe. I have quartus II 5.0. I have the design working with both the -10 and -15 part now. I would probably be more cautious with timing if the output wasnt going to a bank of LEDs. If it glitches every so often, it will be undifferentiated by a human right?? I dont see any glitches or issues with the system running right now. Now when it comes time to do the 32 buttons, I might be in for trouble, although it worked when it was breadboarded too.
Thanks matt