Can't upload an Application Icon : It seems you did not upload a valid image

[blog4ever]

I can’t upload an image for my application icon, although its a valid PNG, 179x179, 12Ko. Why ?

Here is the image : http://imgur.com/gYe0ohB
And here is the message : http://imgur.com/JrDjwt6

[blog4ever]

Its working now, even with the error message.