That’s interesting.
BTW there are 2 new versions of the wiimote with motion plus. The newest of the two (with a TR at the end of the device name) was only released late last year and is difficult to get in some parts of the world right now. Perhaps you’re thinking of the earlier version? I know that others had no issues with that one either. Of course I could be wrong.. see http://wiibrew.org/wiki/Wiimote#SDP_information
Andrew