Mark? Would this have anything to do with the issue we discussed re: the Sonos?

In the unlikely chance that anyone else is interested... with the present "double wireless" setup (wireless from my router to the one below which rebroadcasts the signal on a separate SSID) SWMBO's Sonos won't work unless connected by Ethernet. Sonos' tech support suggested that the second router was the cause of the problem, and indeed, unplugging that router allowed the Sonos to work properly.

tanstaafl.