Comment # 2 on bug 917961 from Wolfgang Bauer

I can confirm this.
The problem is that okular 14.12.x (from the latest KDE update) contains
libokularcore.so.6, while okular 4.14.x (as shipped with 13.2) has
libokularcore.so.5.
libsmokekde3 is not part of the KDE update, so it is still built against the
older okular and requires libokularcore.so.5, which is not available any more.

You could probably uninstall libsmokekde3 (as I did) to be able to install the
updates, on my system this was only needed by ruby-kde4, which in turn you only
need to run KDE4 applications/plasmoids written in ruby.

The same problem also applies to calligra (calligra-extras-okular in
particular), but in this case you could at least install the version from
KDE:Extra as workaround.
And other packages might be affected as well.
"osc whatdependson openSUSE:13.2 okular standard x86_64" gives this:
   calligra
   kdebindings-smokekde
   mono-kde4
   perl-kde4
   python-kde4
   python3-kde4
   ruby-kde4
I suppose all those packages should be released as update as well, built
against KDE/okular 14.12.x to fix the problem.