Windows Screenshot->Paste Error on Windows Vista

[KasumiArai]

I realize much work was recently done on this, but at least for poor Vista, there is still a regression.

So alt+printscreen makes a screenshot of just the active window. If this is done, the paste has incorrect alpha in the important bits.
Last working version is 1.2.6.

With a printscreen of the whole screen (so just printscreen key, not alt+printscreen), the title bar does not paste correctly but the rest is fine.
Example of that:

Version 1.2.7.3 on the bottom.

Something tells me this has to do with the new chrome paste behavior :( I'd rather have screenshot paste than that if only one is possible.

Aseprite 1.2.7.3-Steam on Windows Vista 32 bit