Hi all, sorry it's take so long to update this—I'm in the process of moving, so I've had little time to carve out.
It is indeed an issue with the way I powered it down. Lately, I've been just switching off the whole rack at the power distribution, and so the Profiler was not getting the full power down sequence that happens when it's turned off via the rotary switch (as one or two of you mentioned).
I did a few tests tonight (which is painful with the long Profiler start up time) and everything is hunky dory when doing the proper rotary knob power off before turning off the rest of the rack.
Ciao!