I had the issue too, and 2.0.2s fix it for me,
but the weird thing is that I activate FastCharge and forget to turn it off (it is still in init.d) however adb and internal sd card mount to pc are working... Never see that working when fast charge on , before....
SlimBean2.0.1 + Semaphore 2.0.2s
Mounting as mass storage to pc, is it Kernel or Rom feature ? External Sd card do not mount, was working on Helly Bean...
Also data transfert seems to be back at 2mb/s instead of 10mb/s
Very strange. I'll investigate a bit more at work.
External storage won't mount on slim bean & Semaphore as per design.
HTH,
LV