Lock screen icons are different to theme installed. How do I change them?

[AC Question]

Lock screen icons are different to theme installed.

It's driving me nuts! I've downloaded countless themes with different icons, but what ever I do, the lock screen icons are the original ones. How do I change them, can't find anything.

 

[heide novell]

Sounds like those particular icons are set outside of any theme and can't be changed.

Is this really a problem, I mean, so the icons are not exactly what you want, but what difference does it make?