My mouse is messing up, so I'm getting a new one. But in the mean time, for the last month or two, I've noticed I've been double-clicking on accident pretty often. The only fix for now is to hold in my clicks longer.
But as you might be able to tell from my favorites, I've managed to favorite a few pictures twice because of it somehow. I'm even on the faved-by lists twice.
I'm beside myself.
Example: post #718683 's faves.
Updated by user 144118