francois, this seems odd. DoF equations are short and simple. The calculations are quite simple and straight forward. I use a TI-30XA pocket calculaotor with no problems, including calculating the CoC I need to use.
I have only limited access to the internet these days so my answer is short.
I know this is weird and I will reinstall the DoF widget when I return. Running "top -u" in the terminal confirmed that it was using more than 80% of the cpu on a dual G5...
I'll let you know next week.
Edit: Just wanted to add that the DoF widget used cpu cycles as soon as it was loaded. No need to do any calculations, no need to display it...
Francois