I’ve been moving sites from one host to another. Was going okay, but when I set one site live, it was a disaster. Only text would show. Following image links generated level 500 server errors. I thought it was javascript-related.

Contacted support, and they told me that mod_security was blocking something. Funny, never did at the old host.

Well, when all the dust settled, it turned out to be the domain name – innocuous enough: gpconcretespecialist.com

You don’t see the problem?

Well, the host’s local mod_security rules were blocking c i a l i s.

Kinda a bad rule at that level, as there must be zillions of sites with “specialist” in the name… but kinda funny too, as I’d never even noticed that before.