A new Steam client has been released and will be automatically downloaded.
- Fixed library drop-down menu no longer displaying after changing the library filter
- Fixed Xbox controllers showing up twice on Mac OS X
- Removed guide button emulation using the back or start button, except when using Steam Remote Play. This feature was causing some issues with some fightsticks and retro controllers and will be re-enabled for locally connected controllers in the future.
Steam Windows Service
- Fixed privilege escalation exploit using symbolic links in Windows registry
Source link: News – Steam Client Update Released