Thats it!
But,
I expect from tools like "Paste Alpha" a true, pure "paste alpha" function, not combining of any others!
But "PasteAlpha" does more, combining (or use) other pixel-values for alpha!
I'm sorry, in my mind thats the mistake: Transparent areas of images are not "white" or "black" (or near that)!
In this Version, "pastealpha.dll" isn't usable as "true alpha mask"!
Best regards,
Udo Fuerhoff