Updated and nothing's unusual.
-Download OSXUpd10.9.1.dmg via http://support.apple.com/kb/DL1707
-Copy AppleHDA.kext in S/L/E to desktop.
Begin to update:
-Install OSXUpd10.9.1.dmg, let in restart machine.
-Reinstall AppleHDA.kext in Desktop by Kext Wizard.
-Repair permissions again.
-Reboot and done!
Here's the easier way to update:
Repair Permissions using the Disk Utility on the drive to be updated;*
Use the Software Update to download and install 10.9.1;
Run MultiBeast v6.01+ and just select your audio driver to install;
Repair Permissions again.
* You can use the Terminal instead of Disk Utility if you feel comfortable with a UNIX command:
sudo diskutil repairPermissions /
Any news on 10.9.1. released today. Is it safe to update?