Yes sure!
http://www.monbonheuramoi.com/
I create the images 536 x 232 with a resolution of 300 pixels/inch. I use the same resolution on all my images and they look fine. I also save all my images using the ‘Save for Web’ option in Photoshop and choose JPEG High (Optimized). All the other images look fine except these ones. And they only look like this once uploaded in this section. The original images are clear and white is white.
I hope you will find the problem! This is the only thing I couldn’t solve by my self. 🙂