@leocg Thanks, I've found where the conflict was. It were wheel gestures in crxMouse extension. However before the update it worked fine.

Now I'd have to find some other way to get these wheel gestures which I really liked – right click+scroll up/down to go to top/bottom of the page.

I also affects eg. notifications panel in Facebook.

Since the update, I have problems with scrolling in an area of a website if it has nested scroll area (eg. second scroll bar).

Examples of affected areas:

• pop-up when I click on an action in Facebook sidebar on the right
• pop-up when I click on a note in Google Keep

Actual behaviour:
When I scroll with scroll wheel, instead of moving the area inside the pop-up, Opera moves the background of the pop-up.
If I click the scroll wheel and then scroll, it allows me to scroll within the pop-up.

Expected behaviour:
It should scroll the area over which I have my mouse cursor.

There was some minor update, but this thing is still not fixed. Updates should make navigation easier, not harder. It's totally unintuitive that you can click however long you want on the edge/corner, but you can't close this menu. Even a few pixels more to the center of this button, you still can't close the menu. Why act against those who like navigate with edges and corners?

The same applies to the dropdown Opera menu. Visually it reaches the left edge, but you can't click anything by clicking with mouse on the left edge of the screen.

Since the update, I can't close the Opera menu by clicking the same spot I clicked to open the menu. You can open the Opera menu by clicking anywhere on the edge of the screen in the "Menu" area, but you must move your mouse away from edge of the screen more to the center of the button to close this menu.

Here's the spot I'm talking about – pressing both on the corner, the top, or the left edge of the screen can't close this menu.

+1 on this issue. It is incredibly annoying to view PDF-s when part of document breaks and some text is sliced.

I noticed that if you wait about 3 seconds after the glitch appeared, the glitch disappears (of course until you decide to scroll your mouse again).