Comment 3 for bug 926493

"This picture will be associated with your user and displayed along with your username in places." would be neutral way of starting the same thing.

This way the sentence would work for any of the flavours, even these that don't use the picture in the screensaver or use it on the login screen.

I'm fine changing the string to the proposed one above, but I'll need release team, documentation team and translation team approval before doing this as it's an important string in the installer and is likely in some documentation.