Fixed.
Until we can release a patch, here's a quick n' dirty workaround as there might be quite a few of these blue frame bugs.
If you encounter blue frames:
- Check the monster ID in docs/monsters.html
- Go to NPC/# (# = ID of the monster)
- Delete empty body parts
Reason: Our .png optimization tool does something weird to empty .pngs causing them to render incorrectly.
Deleting them throws a console error, but shouldn't affect gameplay at all.
We need to either change the image optimization tool, or change how we handle monsters that use a shared animation while having less body parts.