BrokenBull: I just started to play Sacred Gold a few days ago. So far I came across two quests that I cannot complete because of a bug. The Whispers in The Wind quest is when you have to retrieve berries for a witch. I can pick up the berries and it is logged in the log book that I have them, but when I speak to the witch she response as if I don't have the berries yet.
The second in-completable quest is The Painting. You have to retrieve a stolen painting for an art collector. You can get the painting and it is logged in the log book, but when you speak to the art collector he response as if you don't have the painting.
Does anyone know if there are anymore in-completable quests because of bugs? Maybe we can list them all here so everyone is aware when they play it. Thank you.

powergod: Prepare yourself to be used to it... if a secondary quest don't work as expected, just leave it as it is and go on... mostly there are no solutions (I also experienced the painting quest bug, and some quests with unlockable doors)

I was also stuck in the main quest once, I had to take water for a starving soldier, but I had already took it time before while exploring, so there was no more water to get and the soldier wasn't triggered... but luckily, using the console I was able to respawn the water again (just typed "wasser" on the console), and after I picked it up again, I was able to speak with the soldier.

As far as I learned, it is better to NOT wander around without a quest... because the risk is to trigger something before it's the right time...