Thanks for the reply. The customer is leaving this morning for a couple weeks in Europe, so I've got time to tinker with this one (and even get an IR learner!). I *did* start looking into the actual IR code, and yeah, that gets messy kinda quick.

FWIW - there's also a Roku in the system, being controlled by IR, and it does not do this.

I'll post up if I make any progress!