Our printer just spontaneously printed two strings...

I just got home from vacation to find three of these printouts as well. I had no devices other than a Logitech Revue hooked up to my router all week so this isn't coming from a locally connected machine (at least any of mine). I do have a HP Deskjet 5900 printer hooked into the Time capsule.

Consider the possibility that some box on your network has been compromised, and has some outside user logged into it (or some script running) that is running nmap. As I understand it, this is one of the first things a hacker does, to get an idea of the other machines and services in the subnet he's just penetrated.

Like a previous poster, I too run nmap periodically and have to specifically exclude HP printers, because nmap makes them waste dozens of pages of gibberish.

Strange my printer just did the exact same thing 5 minutes ago!

The same thing literally just happened to me. How bizarre.

Mine too. Anything in common? My printer is a HP Deskjet D5560 connected via Wireless.

Nope, that's not me ;-)

I'm still trying to figure out what this is. If it happened to multiple persons at the same time, we need to figure out what we have in common. What about your printer?

don't the "sqli☺3" is simply "sqlite3" (http://www.sqlite.org). It is a very common database software used, for example, in iOS.

I guess you're right ;-)

For what it's worth, this happened to my HP printer (connected via wireless) at exactly the same time, and I have no Mac or other Apple equipment.