Comment # 11 on bug 953954 from Wolfgang Bauer

(In reply to Jaroslav Kamen�k from comment #10)
> I have added
> http://download.opensuse.org/repositories/KDE:/Frameworks5/openSUSE_Leap_42.
> 1/ and upgraded everything, installed sni-qt-32bit.

You'd only have to upgrade xembed-sni-proxy, but well...

> Skype icon is OK now,

Ok, that indicates that it's indeed a problem with xembed-sni-proxy I think.
If you install sni-qt-32bit, Skype uses the "new" SNI protocol directly and
doesn't rely on xembed-sni-proxy.

> pingin and opera still missing, workaround does not help.

Strange, as mentioned Opera 12.16 works fine here.
What version of xembed-sni-proxy do you have installed now? (just to rule out
that you didn't upgrade it by mistake)
rpm -q xembed-sni-proxy

Did you logout and login again (or reboot) after upgrading?

For pidgin, there is a pidgin-indicator extension available to make it use SNI,
could you try to install that? (it's included in Leap 42.1)

There has been some more changes to xembed-sni-proxy which are not in the
openSUSE package yet, I will create a package for the latest version for you to
test.

Other than that, I doubt we can do much. Actually xembed-sni-proxy is just a
hack for legacy compatibility. If the latest version still has problems with
certain applications, you should probably file a bug report upstream at
http://bugs.kde.org/ (it will be officially part of Plasma 5.5).