The music bug I sometimes get in combintion with the other bug where combat music plays while the normal ambient track plays as well. When the fight ends, I get very distorted audio at high volume.
Some strange thing in the black cove:
I managed to bypass the ominous black gate (are we supposed to? I used the pyramids...). At the end you meet some npc who teleports away with your char. He only picked up Roderick, however, leaving Scarlett behind. It was not possible to switch to Roderick, using Scarlett's pyramid did nothing, and the possibility to go to the Homestead was gone as well, leaving me trapped in the cave.