Are there two chimneys on the roof, and you're standing between them when you fight Onsokumaru?
Alright, I found it. I had changed the code to change it from a "Move Down" command to "Turn Down" to fix the character getting stuck, but I neglected to change it on the refight page. So Laine is trying to walk down, she's hitting the chimney (that I added to help funnel the player to avoid this), and the game can't resolve that.
It's fixed on my end now. I have a few other people that had previously alerted me to bugs, I'll check back in on them to see if they have anything else to report, and if they don't, I really should upload a new version.