I haven't been here for a while, maybe this was previously discussed, but I have a serious issue with this vertical window "frame" that Opera now has. If my mouse slides to the left and I try to scroll the page, it doesn't scroll because the cursor is on this couple of pixels wide frame. But my eyes do scroll, expecting the page to scroll as well, and I got some very unpleasant and weird vertigo-like feeling. Which is absolutely awful. If the top-bar can pick up mouse commands (click the active tab to scroll to the top), I am sure picking up scrolling when the mouse cursor is on that frame is also possible. This is becoming so annoying and physically unpleasant that I am thinking of switching to another browser, at least until it is fixed with some option like "Disable tab bar's top spacing when browser window is maximized", or something similar. I'm pretty sure this isn't just me with this issue.