I fixed it with my host. If others have the same problem, contact me, I'll explain it thoroughly.
It's basically a problem that everyone is hotlinking tons of images here, so hosting providers think this site is trying to leech bandwidth from their servers (called referral spam). It's called referral spam, because every time pixelation shows an image from another domain, the browser attaches a referrer URI to the GET request.
The hosting service registered Pixelation as a referral spammer, through mod_security in Apache. Once I declared it a false positive to my hosting service, they rectified the problem.