Hmm, I guess I'm kind of excited here. This is my first bug fix as an admin for the website.
I wasn't looking for it, or trying to fix it, but I was just surfing around the server on PHPMyAdmin, and I came across the entry in a table where the offending "Cache reday to search" text was, and edited it. I didn't have to modify and upload a new version of a PHP web page or anything. Click on the link in my first post, and you will see the log entry is now Cache ready to search. I will now close this thread. First time I've done that too.