After rescuing Anya, I stopped at Malah's place first. Since my Inventory was full, she tossed the scroll on the ground and started her "Thank you so much for..." speech, but I'd heard it a few times before, so I just clicked her again to shut her up and get to the Trade screen.

When I clicked on her, she tossed another scroll on the ground and started her speech over again. Ah yes, the bug! I clicked again... and nothing happened. I couldn't get her to drop any more, which sucked, because I was looking forward to getting a screenie of a whole Harrogath full of golden scrolls.

As expected, the first one worked fine, but I couldn't pick up the second one.