Thanks so much dohman! I had seen other topics also indicating a disc space shortage, but the hosting firm said no, it wasn’t on their end. When I got your post, I went back to the hosting company and was a lot more forceful about it. They dug around and in my case, found that it turns out that there was an error in a RewriteRule in the .htaccess file of my primary domain. It should have looked like this:
RewriteRule ^.*\.(jpg|jpeg|gif|png|bmp) /wp-content/plugins/wp-retina-2x/wr2x_image.php [QSA,L]
I did not realize that the .htaccess file of the primary domain could impact a subdomain. Learned something today.
I appreciate your taking the time to point me in the right direction dohman!
