Since the day before yesterday, there's also a new firmware (1.2) for the Metz M400. The update program can be found here: Please login or register to view links Improvements: 1. Depending on the camera type the remote master- and slave-mode are supported. 2. AF-beam enhanced. 3. Distance indication for manual zoom setting enhanced. 4. Stand by mode is activated if the FUJIFILM X-T1 is switched off. 5. "REAR" is displayed if the function is set on the camera. I couldn't test it yet, as I always have to use a friend's Windows PC to install it, but from what I hear on the German Fuji X forum, it also addresses the underexposure issues some users have reported here.