you can also click the wheel if you have one or the middle mouse button if you are on a laptop that has that or such an old mouse.
some laptops also allow to treat click both mousekeys to middle mouse button.
New update - Opera stable 53.0.2907.68 ;-)
The change log, and the announcement.
"Today we’ve prepared for you a quick Stable update. @Harelt San Luis, we’re happy to say that we fixed the bug with black rectangles!
Also, we fixed the sidebar hint, covering the address bar on Windows."
Under Settings > Browser > Shortcuts, you might try disabling one or both of the "gesture" settings. Mind you, in old versions of Opera it wouldn't help, so no guarantee it will in current versions - but that's all I can suggest. (Properly, "mouse gestures" are right button drag actions, while "rocker gestures" involve quickly pressing one button then another, and hence neither actually covers the scroll+modifier key case; but that is the best I can suggest.)
Thanks @jonnyboy! It worked for me! However I was having problems to loging in at Opera website after changing user agent to Chrome. It could bring security issues too, if you leave it enabled. I changed it back to Opera to continue browsing at other websites and Deezer is still working! Just do not refresh Deezer webpage after!
. I agree, Opera desperately needs a button to force a manual sync in situations like this. There is a delay in syncing between android and pc with me most of the time but, it does have current sync data when it does sync. Resetting sync will erase everything so I don't think that's what you'd want to do. I would just keep trying logging in and out and hope for the best. It sometimes makes me log out and back on several times before it'll sync anything. It's a pain when that happens, but sync does eventually work.