yeah, is that a common problem?
Viewing post in The Science of Staying Awake comments
Not common per se, but one other person has reported it. I think I've found what causes it, though.
Open the custom_screens.rpy file in Notepad or any other text editor and replace ShowMenu("kissdesc") with Show("kissdesc", transition=dissolve)
It'll be patched in 1.2, but it's a bigger update so it might be a while since then.