For a long and strange reason, I found I needed to use a X10 "powerflash" module. I had two on hand - one new, and one that had "mode 1 - Dev only" written on it.
Anyway, ran some tests and the "new one" would send the device On as well as a "All on" when triggered, while the one with my obscure note would only send the "dev on" (exactly what I wanted!).
I must of hacked it at some point!
Anyway, I can no longer find the "hack" site for X10. Anybody have a link? Worst case, anybody remember the hack for the powerflash?
Thanks in advance...