Alexander, good feedback. (Oh, BTW my Nokia HS-26W did include a step down adapter in the box, just FWIW) I noticed this sequence of events this morning(generally speaking): I powered up my PBook with the (Nokia) headset(HS) left powered off. Then, after charging the HS I powered it on. Then, all the "problems" from the past re-occurred, and of course I was very perplexed. Then, I powered the HS on and powered the Mac off/on via restart. Viola, everything worked as well as yesterday (see my previous post). I am beginning to wonder if the "problem" in some/many cases may be related to this kind of 'sequence of events', especially considering the fact that you have been successful with all of those different HS. Perhaps something as simple as a "general usage guidelines" would be useful. Dunno. Anyway, I am probably gonna be more scarce 'round these parts, although I will check-in from time to time, mostly because I seem to be off and running with my HS needs satisfied. Thanks to everyone who has helped in general.