...Are they crisp and sharp once again?... Depending on the site where you upload the photos, you may be looking at thumbnails of the pictures, which will be less that full quality... Many sites have had to change to thumnails because of the amount of server space required for extremely large file uploads.. Is that the case here?
Hope this helps.
First off, I am an amateur photographer. I've uploaded thousands of pictures online, which are edited & sharp. Two days ago, when I view pictures online, not just mine, the dark areas of the photos are like a solid black mess. It looks like they were edited with a charcoal or pencil tool. They have no detail in the dark areas, and the lighter areas are 'blotchy' as well. Everything was fine until a couple days ago. I haven't added any programs or anything.
One thing that's strange is, if I look at a photo that I've uploaded, it's image quality is horrible, but if I open the same photo from a folder on my PC it looks fine, nice & crisp. Again, this just started, the online pics used to be crisp.