Patch 1.7 for Might & Magic: Heroes VI has been released, as announced on the official site. To install it, you need to connect to the game and run the updater. Alternatively, you can download single .EXE files by using the same URL as the other patches, but change the number to 1.7:

The patch contains many bug fixes including those discussed with the Limbic team. Check out the full changelog for the game here (see page 21 for the 1.7 changelog).

Note: As I was typing this, I also found out that a hotfix had already been released in order to fix a game-breaking bug. The current version is therefore 1.7.1. See procedure above to download it.