Comment # 1 on bug 1022821 from Wolfgang Bauer

(In reply to Daniel Wachter from comment #0)
> kile requires
> oxygen5-icon-theme or
> oxygen-icon-theme

Well, it's a bit more general I suppose.
*All* KDE4 applications use the oxygen icon theme as fallback, and therefore
may require it.

In previous openSUSE versions, kdebase4-runtime required oxygen-icon-theme, but
that got removed at some point (about a year ago).
I think it would be better to re-add that dependency there...