4. Why? It's not like Diablo where tons and tons drop after each encounter.
5. Does the savegame work if you try saving again, or does it give you the same message no matter how much you try? Because I sometimes get the message, and find that it works if I save again. Some other people reported that it repeatedly failed though. (Also, verify your files through Steam just to make sure, etc...)
11. "When selling, a double click at an item could should ALL items at once."
Should what? Sell all? Normally, you don't want to do that anyway.
12. Agreed, but it doesn't look like it'll be in.
14. Not necessary. Except for ambushes, you can pretty often see enemies from far enough away before fighting starts, and you can enter sneak mode (C) to get closer and scout them out.
