hud Done some more digging!
It only shows up if you open the app while both the built-in display is open and the external monitor is active. If you start the app while the laptop lid is shut, then open it, it's fine on both.
- This does happen at lower 16:9 resolutions
- It's happening in Apple's Mail.app too! But not Safari. I've spotted it in iA Writer too. So I'm guessing it's a bug in one of Apple's frameworks, rather than Orion-specific.
Here it is in iA Writer:
