What? "...your iCloud session periodically expires"? I never was on iCloud?

"To maintain security, your iCloud session periodically expires. To reconnect to iCloud, please enter your password and click OK"

I never had any of my computers on iCloud.

Snow Leopard hold-out.

I have recently got tripped up and accidentally went to iTunes 11 on one of my computers (was holding at 10.6.3 for PPC mac accessibility) ...

is this why I got this prompt? I have never signed in to this iTunes 11 computer on iTunes, anyway.

Is iCloud now some sort of default when you upgrade to iTunes 11?