Recently I started noticing a problem which has grown considerably and is almost preventing me from using Opera alltogether. I often write articles on web pages, big articles, on a variety of fora and since a while I began to notice that whenever I scrolled back and forth in the article (to proof read and make corrections) the whole webpage starts to move up and down instead of only the text in the textbox. Worse yet: this would often result in making the section I'm working on completely invisible.
I shall give an example... here is a tutorial which I was writing yesterday. In this screenshot I clicked behind "foe" and placed the cursor there, nothing special at first:
But the very moment I start typing the whole page starts to move and I'm suddenly left with this:
The textbox is now somewhere at the top of my screen, I'm looking at the bottom of the screen and worse yet: can't see my work anymore.
Now, the Minecraft server you're seeing here is using an older version of Xenforo so at first I blamed it on that. But these days I'm getting the exact same behavior on other fora as well, for example the FreeBSD forum which uses a more modern version.
I tried using safe mode in order to rule out plugins, but that didn't have much of an effect. In all honesty I also can't imagine how a plugin could affect the way the browser behaves while editing a textbox.
Does anyone have an idea?