I've had 2 of these keyboards and the problem happens in windows with each. Some reports suggest it is related to the power management but the suggested methods to enable you to turn off power management no longer appear to work. Furthermore, I don't think Microsoft is interested in fixing it so at this point I think there's enough people affected by this in the several forums I've read + I'm sure there's at least several thousand more to get a lawsuit going against Microsoft for this.
What do ya say MS? Fix the issue ASAP or should we get a lawsuit going?