Whenever upload images the quality of the uploaded images is not satisfactory. They are blurry, either viewing them from Media Manager > View tab, or embedded in an article. Read some posts but didn't get a concrete answer or solution. This happens to FF, Chrome.
1) How do you have the wiki display your images?
2) Are you sure that you upload the images in the resolution you want?
3) Is your wiki a public wiki? Can we see it?