Lepidi (translation here) reports the serial numbers of the European E-M5 cameras affected by the crack issue:
– Black: BEK501001 til BEK508887
– Silver: BF4501001 til BF4503865
Contact your local Olympus agent if you have that crack issue and they will fix it for you.
Something else: Olympus to Attend Focus with Damian McGillicuddy (Photographyblog).
And finally for EU readers: New refurbished Olympus cameras are on auction at Olympusmarket. This includes some of the latest cameras:
E-M5 auction 1, auction 2, auction 3, auction 4.
E-PM2 auction 1, auction 2.