Ugly edges with smoothing enabled

[Dlaor]

I'm making my first game using SFML but I've been getting some bugs with sprites. The images get an ugly edge at the sides when smoothing is enabled. Here's a picture which demonstrates the problem.

As you can see, the ball on the left has an ugly white edge at the top and at the side. The one on the right is the desirable result.

I know that setting smooth to false fixes it, but I still want to have smooth graphics. How do I fix this? (using SFML 1.6)

[Stew_822]

As far as I'm aware, those are the only two options available to you

But you never know, someone smarter than me might come along and find a fix

Could you possibly smooth your graphics before even loading them into your game? ie. do it in the image editor?

[Groogy]

The Edge comes from the image border right? Just have the image 10 x 10 bigger move it, smooth and then move back and resize or something like that. Though easier would be to implement a gaussial blur shader and use that.