Magento resize() image quality: dirty white background

Question

I have a client who is seriously unhappy with the way their product thumbnails are rendering on Magento.

The dodgy appearance is noticeable on two accounts:

Answer 1

I had the same issue with some of my images, later i realized that those images with lower resolution were getting distorted, try using an image more than 1100 X 1100 and it should work just fine !