White color is considered as transparent when we copy a picture

[veler]

When doing, for example, a screen shot, the white colors of the picture are considered as transparent while generating a thumbnail.

While fixing this issue, be sure that a copied picture with transparent still appear as transparent (Paint.Net is a good tool to test with).

[vmichalak]

wtf ?

[veler]

It's a funny issue linked to picture encoding. :)