-The udevadm tool moved from 'sbin' to 'bin'. Some tools expect
-udevadm in 'sbin'. A symlink to udevadm in 'bin' needs to be
-manually created if needed.
+The 'devtmpfs' filesystem is required now, udev will not create or delete
+device nodes anymore, it only adjusts permissions and ownership of device
+nodes and maintains additional symlinks.
+
+A writable /run directory (tmpfs) is required now for a fully functional
+udev.
+
+The default 'configure' install locations have changed. Packages for systems
+with the historic / vs. /usr split need to be adapted, otherwise udev will
+be installed in /usr and not work properly. Example configuration options are
+in INSTALL.
+
+The default install location of the 'udevadm' tool moved from 'sbin'
+to /usr/bin. Some tools expect udevadm in 'sbin'. A symlink to udevadm
+needs to be manually created if needed.
+
+The expected value of '--libexecdir' has changed and must no longer contain
+the 'udev' directory.
+
+Kernel modules are now loaded directly by linking udev to 'libkmod'. The
+'modprobe' tool is no longer executed by udev.