I use a bunch of x-10s and CFs, never had a problem before yesterday. Had a 25 watt CF in a reflector over my wife's knitting chair and she complained the light was flickering. Tried to turn it off with x-10 and NONE of my x-10s worked. Had to manually unplug it, then everything worked.
Apparently the down facing unvented reflector concentrated the heat and overheated the CF electronics. After it cooled down it worked normally, no x-10 interference.