I've had the same problem and it seems to be related to the zoom, when I reset it the images were rendered correctly.
The difference between the rendering on linux compared to windows could be because of this: http://blog.vlad1.com/2008/03/18/a-little-more-cairo-just-for-you/
"Linux users will have to wait a little longer to get higher quality image scaling; as we now rely on the X server to do image compositing through the Render extension, we'll have to wait until the pixman patches are integrated into the X server. I'm hoping that will happen in time for the next X.org release."
I've had the same problem and it seems to be related to the zoom, when I reset it the images were rendered correctly. blog.vlad1. com/2008/ 03/18/a- little- more-cairo- just-for- you/
The difference between the rendering on linux compared to windows could be because of this:
http://
"Linux users will have to wait a little longer to get higher quality image scaling; as we now rely on the X server to do image compositing through the Render extension, we'll have to wait until the pixman patches are integrated into the X server. I'm hoping that will happen in time for the next X.org release."