hello guys,
just upgraded to leopard on my white macbook 2ghz/core duo.
I've been using an apple external usb dial up modem that worked great under tiger.
Now everytime I connect the usb modem and try and connect I can hear the dial tone and afterwards the system freezes completely to the point that I have to force switch the computer off and restart.
The problem persists untill I unplug the usb modem and then restart os.

I found many threads on several sites but not a fix mentioned.
Have you guys any advice to give.