No program running in the background that should simulate clicks. Especially why should it simulate a click in Opera, but does not in Firefox or Internet Explorer? I would notice simulated clicks in games either. Unfortunately nothing like that running on my system.

I tried it with closing the Sharkoon Drakonia mouse driver and the Razer Synapse keyboard driver. By chance I tried it today with a new mouse, but the problem continues.

Often I prefer scrolling through sites with the middle mouse button, especially at very long sites.

But the problem is that Opera kind of "cancels" this mode each about 1.5 seconds. I conclude this due to tests with differently timed clicks. (Sometimes it is canceled near-instantly, sometimes it takes up to 1.5 seconds) On other browsers this problem does not occur, so I think it is an Opera problem.

Does somebody know this problem or struggles with it, too?

Regards
kitkatschinky