If Dark 5 / Light 5 time needs to be extended, I also agree that 18 hours is just way too long. 4 hours seems to be an appropriate / reasonable length of time.

Hey guys - Believe it or not, I have a fix for this - I'm curious to read if this works for anyone else.... Raise your graphics setting, and yes I know how weird it sounds. I was stuck when I found this thread. Most of the "solutions" didn't make much sense to me. However, I tried the fullscreen / window mode and it didn't work. I tried logging out and back in - didn't work. So I switched back from window mode to fullscreen and jacked the video setting up to High, and POOF the conversation suddenly worked without a hitch. I suspect that the graphics settings are why some people were able to fix this on a different PC.