I asked this question once before but did not get a solution. If I save an image from pse the desktop icon of this image is pixelated. See attached before and after. How can I fix this?
Seems like your document size is really big. a normal A4 has a size of 8.5*11 in and it seems like your image is too smal on that document and hence shown as pixelated. Try resizing the document to image size numbers and check sacing it.
I tried creating a new file from File->New of the same size of your image. Then pasted one of the my images of similar size and saved as JPEG with default settings with 8 quality and baseline (standard) choosen and it worked fine.
Also check that under Edit->Preferences->Saving files - Image Previews is not never save.
Let me know.