One more that seems like a tiny thing but is really annoying in actual use: if my mouse is at the top of the screen, it no longer counts as over the tab. That means that I can't just flick my mouse (or finger on a touchpad) to the top of a screen to...
I'm not a fan of the gradient in the address bar, particularly on the dark theme.The very rounded corners (for example, in the ctrl + f box, or the menu bar) feel off because text comes very close to the corners. (This may be specific to compact.)
