The ones you mentioned are documented but not common. Third party batteries tend to work incorrectly/display incorrect battery usage on the small display on top plate. I had a camera shut down on me with a third party battery mid shutter cycle. Popped a fully charged genuine leica one in, no problems since. They're expensive but its the one thing I'm not risking on my M8.
Research the best SD cards for the M8. I wouldnt put a 32gb card in as the camera was developed around the time when smaller cards were the norm.
Other than that, it's an 'issue free' camera. Quirky, but no issues.
At 1500US or less you're getting a camera that cost U$5500 new (6,500U$ in today's dollars).
A second to none ccd sensor at low ISO with an optical rangefinder. Not a bad deal.
If you havent yet, go shoot one, listen to the shutter. It's quite loud. The m8.2 less so.