Photoshop Background layer
The background layer is locked by default. When I unlock it, PS creates a new layer layer0 and deletes the background layer.
Is this a bad thing to do. Does the background layer have any special significance or properties that it shouldn't be deleted/replaced? Should I instead copy of the contents of the background to another layer and leave the background layer alone?
I noticed that when I open an image, PS automatically puts the image on the background layer. How do you handle opened images before working on them.
It's not a bad thing to do. It won't do you any harm.
Keep in mind you can only do layer effects on a "layer," so the flattened default background isn't too useful.
If your image is a photograph and you want to do some manipulations, it's best to make a duplicate of the background first.