There aren’t all that main changes in the Debian Installer Stretch RC4 release, and among those that caught our attention, we can mention support for Xunlong Orange Pi Plus and Xunlong Orange Pi Plus 2 single-board computers, switch to DTB for Buffalo Linkstation LiveV3 (LS-CHL), and bump of Linux kernel version to 4.9.0-3. Additionally, the fourth Release Candidate of the Debian GNU/Linux 9 “Stretch” Installer re-enables u-boot images for OpenRD, adds all AHCI drivers in sata-modules, includes tifm_7xx1 to mmc-modules, and move mfd-core to kernel-image, as it appears to be required by both mmc-modules and input-modules.