KDE Plasma 5.6.4 is yet another small update in the development cycle of the latest and most advanced KDE Plasma 5 desktop environment, which has already been adopted by most of the KDE-based GNU/Linux operating systems, and according to the release notes it attempts to fix various bugs and annoyances reported by users.
Since KDE Plasma 5.6.3, which was announced approximately three weeks ago, the KDE devs managed to fix various bugs to the Plasma Workspace, Plasma SDK, Plasma Networkmanager, Plasma Desktop, KWin, KScreen, Info Center, Plasma Addons, Discover, Breeze Plymouth theme, kde-cli-tools, and libkscreen components.