Starting to upload some photos, I found is some effect is changing the tone, contrast or bright of the pictures, causing the lost of original colors. Maybe is possible to show the images without any color filter?
Images You upload should not change at all. Perhaps You are referring to hover effect, where opacity of image is set to lover than 100% - then image might look different.
We just start installing the quick-start version of news template and used the articles in the demo, updating images and text on them. So, the change on colors of photos, maybe are product of some extension used to create thumbnails or effects. I already check using firebug without find nothing unusual, do you have more clues what we can do to fix this problem?