Re: Fwd: overlay face property not used for after-string property

[Richard Stallman]

    BTW, IIUC the problem with linum.el is Emacs's handling of margin text: it
    makes no sense (to me, and apparently to linum.el) for the text displayed in
    the margin to inherit face properties from the buffer point where that text
    is "located".

We could easily turn off this inheritance entirely for margin text.
If we are sure that is the right thing to do.