Clicking Option (drag) on a Layer moves me to Next Document instead of duplicate layer(s)

I know this person posted this a while ago, but just like KillerRabbit, whenever I optioned clicked on a layer it was switching me to another open document. You really don't realize how often you option+click layers to do various things until something like this happens. Just in case anyone else is having this problem, here's the solution. For most of my option+clicking needs, I found that if I hold down the command key while I option+click a layer, I can do what just option+click did in the past. This still wasn't working when I wanted to view just a layer mask, though. After a lot of frustrating experimenting, I found you have to wait for hover text to appear before option+clicking the layer; only then will it truly behave the way it did in the past.  Hope this helps save someone the frustration I went through!