MacBook Pro w/ Leopard - Must force shutdown

[Mr.Gadget]

I have a clean install of OSX 10.5. The system will 9 out of 10 times, not shut down after I go to the apple and choose shut down. It closes all apps and the spinning lines appear (not the colored rainbow spinning wheel), but that is where it stays until I press and hold the power button.
I do run with external USB drives almost daily, but it doesn't seem to matter that they are plugged in or not. I do have Bootcamp right now, but this problem began before I put Bootcamp on.
Any ideas?

 

[e12a]

bluetooth enabled? If so, turn it off. Try that.

check console logs too.

 

[Mr.Gadget]

Hum...

Hum... OK, I will give that a shot since, yes, it is always on for my mouse and keyboard. Thanks!

 

[SheriffParker]

Sometimes my computer will not turn off when I tell it to, and I just go into force quit, and relaunch finder. Then it shuts down.