It's a pretty modest set of improvements, but the "improvement of image quality in lower ISO settings" is interesting. I haven't installed it to my Q just yet, but will do so shortly. It's available here:
https://us.leica-camera.com/Service-Support/Support/Downloads?category=124335&subcategory=&type=&language=93871
Version 1.1 Performance Improvements:
- Improvement of the image quality in lower ISO settings
Bug Fixes:
- Exposure has been corrected in digiscoping mode after switching off and on again.
- Improvement of the Live View in monochrome mode in combination with AF tracking. After installation of the new firmware the Live View now shows a monochrome image. For proper focusing the camera switches to color when pressing the shutter button half way.