1.3: incorrect PNG transparency in the viewer

[phaolo]

XnView: MP 1.3 - 64-bit
OS: Windows 7 - 64-bit

Some PNGs with transparency are displayed incorrectly in XnViewMP's viewer. They look ok in its browser preview, instead.
I've added the screenshots of some example images in both Photoshop and XnViewMP.
I'm not sure if I can share the original files, but you can easily find them online.

Effect: image errors

To reproduce:
1. open some PNGs with transparency
2. check the images in the browser preview
3. check the images in fullscreen (view)

Actual behaviour (bug): some will have image errors
Expected behaviour: correct images

[xnview]

could you send me a png sample?

[phaolo]

could you send me a png sample?

I created a test pic, a simple black circle over a transparent background, and the result is already a mess.

(btw, my first test with a rectangle was actually fine)

[xnview]

no problem, 'View>Use alpha channel' is checked?

[phaolo]

no problem, 'View>Use alpha channel' is checked?

Ah nope, that fixed it. Thanks
(I'm not sure why it was disabled tho)