Yes... I have been getting these notifications that just started this morning.
A couple of days ago, I downloaded 4.4.2 and used Odin to install on my N7100, Rooted, stock ROM and kernel.
Before that, I understood that installing a ROM from another location, like the French ROM, might trigger some not-so-good stuff.
In the notification drawer I got the notification "Knox Security Policy Update... Tap here to allow automatic updates for...." and that's all there was because I didn't want to tap on the notification in case it was going to reactivate Knox and break Root.
I cleared the notifications, but it came back on reboot.
One thing that I noticed is that in searching for Knox in Root Explorer, with 4.3, there were only about eight or so files previously, now there are about 15 additional ones (didn't actually count them, but I have to scroll down in order to see the whole list).
This is gonna sound dumb, but I actually went into Kies (Which, by the way I never use) and got a message that there are updates for my device.
Well, since 4.4.2 Is the latest update for the N7100, I thought that possibly Samsung had pushed out 4.4.3, but in Kies there was no info in the software version field... it was just blank, so I left it alone because this was hot on the heels of that Knox Security Policy Update notification, so I'm leaving well enough alone for the time being until I get some definitive information from somebody here that actually knows what he's doing.
Losing root isn't the end of the world, but it's something that I'd rather not deal with at the moment.