it happened to me too - my new (sic) plm was included with the isy-26 - it was firmware 2.4 - fortunately, the guys at universal devices (makes the isy-26) shipped me a new one overnight (and paid the return shipping for the backleveled one smarthome shipped me) - it is the 4a
did smarthome change to a new ceo a couple of years ago? they seem to have lost their product developement nerds because NOTHING new comes from them (being smartlabs too i guess) - almost like a nerd was the ceo but now they have a mba that has 'cut costs' by axing the developers and boosting the marketing staff to sell devices that are overhyped and underperforming - seems like a company that has decided to 'go public' and now the stock price is the focus
just a guess