Image Quality Problems On CB Options

[CheeseStorm]

So I posted about this quite awhile ago and nothing really got settled.
My problem is the image quality of my graphics when I upload them to CB verses their actual quality. Many of my icons/graphics look far better on my computer or uploaded somewhere else. Particularly the richness of colors and sharpness.

Here are some examples...
The first is uploaded to CB, the second is uploaded to photobucket.


Again here:


And I just tried to upload some of the new ones I made, but as soon as I uploaded them I had to edit them and ask them to be rejected because the colors were so far off.
I've had a number of my icons rejected because of poor quality not caused by me.

How can this be fixed?
(thanks)