I just want to inform you (those who are still running KDE 4) that we released a new version of your favorite network applet. This new release brings to you many bug fixes and should make your life easier. We really recommend to update to the new version as we, not intentionally, introduced some new issues in the previous version. Together with the new release of plasma-nm we also released our libnm-qt library which is also needed if you want to have fixes from plasma-nm properly working.
Summary of fixed issues:
bz#339652 – added missing IPv6 support for OpenVPN connections
bz#333752 – we moved code for checking your current download/upload to QML code and now it just checking for updates only when the applet is opened
bz#329837 – during import of VPN connections we copied your certificates automatically into your home directory, now we are asking whether you want to copy them or keep the path as it is
bz#340306 – fixed initialization of current download/upload speed for mobile broadband connections
bz#338513, bz#338697, bz#339223 – many fixes in secret agent (KWallet) initialization, also added migration for your secrets from plain text files, we dropped their support in the previous version, and store them into KWallet or directly into NetworkManager (if KWallet is not enabled)
You can find new tarballs in usual location, which is  for plasma-nm and  for libnm-qt.