Bug report for r7

[Guest Albert Poon]

Paul,

I encountered a minor problem with r7, which it never happens with r5/r6. My device keeps unmounting my SD card when I plugged it to the AC USB charger (not original). No problem with connection to PC and original AC USB charger. I know it might be caused by the 3rd-party AC USB charger, but it didn't happen with 2.1 and 2.2 r5/r6. Please take a look, thanks!

Albert