Paint.Net 4.0 Beta is available

Just in case you didn't know, Paint.Net is a free image and photo editing software for PCs that run Windows. It written in .Net and has features similar to those big guys such as Photo Shop, Paint Shop and The GIMP.
Now its version 4.0 beta is available for download. There is a feature in 4.0 which I like the most is “Copy Merged”. What it does is copy from all layers as one image, which is equivalent to what you have to achieve
by many steps in v3.5:

1. Flatten the layers
2. Copy all
3. Undo the flattern