I am having an issue in WordPress admin, where the images are not cropping in WP \"edit image\" for a site I am creating and I do not know what the cause is.
If you've tried just about everything but none of the suggestions work, read on.
I was experiencing this issue on just one site in my dev environment where all other sites were working fine. It ended up being a single included file with UTF-8 BOM header. Removed it and voila!