PNG with transparency have black border

PNGs with transparency have a black border around them, see:

imageshack.us/photo/my-images/259/construct2stripes.jpg

This border is not part of the image.

It can be noticed in the backend and during the game.

It is not influenced by the browser.

Closing, please follow the bug report guidelines. Construct 2 has full support for alpha transparency.

Thanks for the reply, but this does not help me out. I have tried using Photoshop, Fireworks (24 bit PNG) and tried to cut off a small piece of the image in the Construct editor. The problem remains. Any suggestions?

EDIT: Ive found a workaround. In Construct I attempted to mirror the image by dragging the small white square. Instead, it enables you to cut the image from the top side. I could cut off the border.

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