A word of warning to users of the new RPi A+ of a potential problem with the USB port when used with certain USB plugs.
During the setup of my first A+ two days ago, I plugged an Edimax WiFi dongle into the USB port, and found it would not mate correctly. On removing the Edimax I found that all four of the USB pins had bent back into the socket, thus rendering the socket unusable. I had not used any unusual force to insert the Edimax, so was disappointed to have damaged the A+ before even switching it on for the first time.
Examining several of my stock of USB plugs including that on the Edimax, it appears that the insulating element inside the plugs can vary considerably in thickness. The insulator on the Edimax appears to be particularly thick, around 2mm, and the sharp leading edge of the insulator appears to have snagged on the USB socket pins during insertion. Other USB plugs have a much thinner 1 - 1.5mm insulating element inside the plug, and in hindsight would not have caused this problem.
The USB socket on the A+ appears to be of a different design to that on other RPi boards, and may be more vulnerable to this kind of damage.
So my advice is:
- check the thickness of the insulator inside your USB plug or dongle, and avoid using plugs with thick insulator.
- when inserting the plug be gentle, don't force it