So, if anybody interested, this is patched libqtgui i386: https://mega.nz/#!rUEzCBiB!-83j59IHbhhWgTZsxE4AK55BppZ85vOf2TsyvJOIKI8 Confirmed to be working on recent KDE from Sid, most likely it will fix qt4 issues with other desktop environemts. Skype shows taskbar icon without any problems. Obviously, you will also need to install sni-qt:i386. It can be also installed on i386 systems.