Most serious users have been greeted by Smart Object bugs. They're frustrating.
Check this one out.
Ever happen to you? What causes it?
What causes it? Someone forgetting about the layer mask they attached. :-)
Yeah, we've all made that mistake at point point or another.
Photoshop's real power is in its ability to combine many features and functions modally that lets you get just what you want done.
Photoshop's real power to confuse is in its ability to accumulate modality in various places that cause something undexpected to happen.
Yep, we've all done it.
Glad that was an easy one.