Found three bugs:

1) Was playing a public game just now with my friend, I had the quest to hand-in 3 Red leads. I did so, the 'spent 3 leads' message appeared in the game log, and I got the victory sound effect and the VP counter on my character sheet did a little light-up animation...

But I didn't get the VP. Nor did the event log give a quest completion message, but the quest card at the bottom showed the quest as complete (green tick) and I could not do it again.

2) In combat as Geralt, I used the Medallion which gives 2 swords for 1 wound. Upon doing this, my Witcher signs were disabled for the remainder of the battle. There is no warning that this will occurr, and it does not appear intuitive so it appears unintended.

3) Incidentally the reason we're in public is Private games simply don't work. He creates a game, and when I try to join it just creates another with the same name.

Bonus: It would be nice to be prompted to use potions before battle, as it's very easy to forget that you can't do it once you roll. It would also be nice to be prompted about the Sorceress medallion not being rechargable! (If this behaviour is intended)