Cylinder #7 down on compression

Post 15 of this thread has a couple of pics of the plugs I pulled out. #5 seems to be the one being talked about.

I kinda look at it as if you walked down a rack of servers, and one was different, looked funny, maybe discolored by heat, label melted, or some such.
You have a choice, report it, or ignore it, this is kinda your choice.