Today KDE released the third stability update for KDE Applications 18.04. This release contains only bugfixes and translation updates, providing a safe and pleasant update for everyone.

About 20 recorded bugfixes include improvements to Kontact, Ark, Cantor, Dolphin, Gwenview, KMag, among others

Improvements include:

Compatibility with IMAP servers that do not announce their capabilities has been restored
Ark can now extract ZIP archives which lack proper entries for folders
KNotes on-screen notes again follow the mouse pointer while being moved