Thanks Skip. It's certainly not a show stopper, just one of several things I wish there was some kind of definitive answer for. Jonathan hasn't been able to give me much beyond "read the source code for theBridge" and "read the RFCs". If I start crashing clients, I'll deal with that when the time comes. It looks like some of the padding was selected for the sake of encryption, but of course we're not using encryption in EchoLink.
Incorrect padding calculation in GenBye()
Critical section handling unsafe in vTaskSwitchContext on Cortex M3/4