The heading for the following two pages are images (Journal and Download). They are pretty much double in image size but still appear to be a bit blurry.
I tried the following code to remove the compression and also tried to regenerate the thumbnails.
I tried the actual image size and it didn’t work because of retina display. So I made the image dimensions exactly 50% of the original size and it seems to have worked.
I’m still not clear as to why it wouldn’t be clear if it’s less than 50%. When I put it to 25% it’s blurry again.