I'm seeing more and more problems of this nature here as well, because whole-house GFIs with a sensitivity of 30mA are becoming increasingly common, even where no GFI is actually required.
I'll try to put "problem" loads on a non-GFI busbar if possible, or swap to a 100mA type, other factors permitting.
If that doesn't work, we can get time-delayed GFIs, which normally fix it. Mucho pesos, though....
[This message has been edited by pauluk (edited 09-19-2001).]