Libretro announced on their blog the release of the next version of RetroArch which is v1.6.3. To get the newest release go over to this page.
From their “General changelog” this is what changed:
IOS: Fix GL regression – 32bit color format cores were no longer rendering
CHEEVOS: Add support for N64 cheevos and other small fixes.
CHEEVOS: Add ‘Achievements -> Achievements Verbose Mode’. Ability to display cheevos related messages in OSD, useful for RetroAchievements users.
AUDIO: Audio mixer’s volume can now be independently increased/decreased, and muted.
AUDIO: Mute now no longer disables/enables audio but instead properly mutes the audio volume. Mute is also independent from the audio mixer volume.
INPUT: Add mouse index selection; ability now to select between different mice
INPUT: Fix ‘All Users Control Menu’ setting
LINUX: Add a tinyalsa audio driver. Doesn’t require asoundlib, should be self-contained and lower-level.
LOBBIES: Announce the RetroArch version too
LOCALIZATION: Add Traditional Chinese translation
LOCALIZATION: Update French translation
LOCALIZATION: Update Italian translation
LOCALIZATION: Update Japanese translation
LOCALIZATION: Update Russian translation
MENU: Add ‘User Interface -> Views’. Ability to display/hide online updater and core updater options.
NETPLAY: Disconnecting one client shouldn’t cause everyone to disconnect anymore
NETWORK: SSL/TLS support, disabled by default
SCANNER: Fix PS1 game scanning
SCANNER: Move content list builder into scanner task with progress, fixes menu freeze with large playlists
SDL2: Fix ‘SDL2 driver does not see the hat on wired Xbox 360 controller”
SETTINGS: Fix regression ‘Custom Viewport is no longer overridable per-core or per-game’
VITA: Add cheevos support
VITA: Add support for external USB if mounted
WAYLAND: Fix menu mouse input
WII: Add support for single-port ‘PS1/PS2 to USB controller adapter’
There are many port specific changes too, which details you will find on their blog post.