In the past 24 hrs, I've cycled power on the pillows twice, once to restore pillow 4 (that died 9 Nov afternoon) and once to restore pillow 3 (that died early this AM). Note that pilllow 4 has the new software, so that wasn't a complete fix, unfortunately.
Also last night, the 5m.c sonic died completely. Previously, it was giving data at 0.5 Hz and only from the sonic, despite me checking that the EC100 was set to Unprompted Data Rate of 20 samp/s. The webcam image doesn't show anything obviously wrong to me. This morning, I've tried pio 0 0/1 and ddn/dup, to no avail.