When I enter sudo shutdown - h now, my A+ will not flash the ACT led 10 time on shutdown. shutown -P now gives the same. If I use a previous version of Raspbian or the very latest (apt-get update, dist-upgraded) still no flashes. If I change the wifi adapter, no change. If I put the same wifi adapter and the same SD card in a pizero, it does flash ten times on shutdown.
The only thing in common is the board, which will never flash 10 times. Otherwise it works fine. Connecting a camera makes no difference. I'm greatly puzzled by this, as how can the board and processor behave wrongly, when the same SD card works on other boards?
Forgot to say that putting the SD card from a working pizero into the a+ still gives no flashes on shutdown.