Some new Leica M10 cameras were shipped with firmware version 1.0.2.0 (most have version 1.0.1.0). It is safe to assume that a new M10 firmware will be released soon.
The only bug I saw so far in the M10 is that the status screen does not correctly display the selected exposure metering mode:
Update #1: the new firmware is rumored to be officially released next week.
Update #2: there are a few more unconfirmed bugs described in the comments section below.
Update #3 – here is the SD card error message on the Leica M10:
