The KDE team has released the fourth in a series of monthly stabilization updates to the 4.11 series
At least 65 recorded bugfixes include improvements to the personal information management suite Kontact, the UML tool Umbrello, the window manager KWin, the web browser Konqueror, and others. There are many stability fixes.KDE 4.11.4 released
A more complete list of changes can be found in KDE's issue tracker. For a detailed list of changes that went into 4.11.4, you can also browse the Git logs.
To download source code or packages to install go to the 4.11.4 Info Page. If you want to find out more about the 4.11 versions of KDE Workspaces, Applications and Development Platform, please refer to the 4.11 release notes.