I'm sure I'm not alone having problems with the keyboard suddenly just "disconnect", with an audio beep and all.
Sometimes it can be fixed by just physically unplug and plug in the keyboard again but thats not always the case.
I know of customers that also tried with an external usb-hub (with separate external power) to avoid power-surge problem, if that could have been the real issue...
I can't seem to find a common cause either ( PC manufacturer, O/S etc)...
The driver currently running is 1.0.0.1, but I'm uncertain its a driver problem as the whole device is lost...
Whats your experience regarding this dudes n dudettes?
