No, I've also had it confirmed by a co-worker -- when he had his Treo, he was constantly getting "you missed a call" when he never heard it ring, and dropped calls. As soon as he upgraded his phone, the problems went away. Also, I never had any problems before I upgraded to the Treo.
Also, I had it confirmed by someone who used to develop applications for Palm. Known problems. And you know it's bad, when the knowledge is so widespread that it trickles down to the developers.