For Olympus OM-D E-M1 released a firmware update that fixes a bug in the previous version, to block the camera
Olympus has published a new firmware version for mirrorless cameras Olympus OM-D E-M1. The new version carries the 4.3 room.
In the new version of firmware fixed a critical bug present in version 4.2, which was released in the beginning of December. Due to this error, the camera freezes and pictures were damaged, if you have selected one of the modes Focus Stacking, Keystone, HDR or Starlight.
Sources: Olympus, 4/3 Rumors
Micro Four Thirds