OK, what AppleHDA.kext do you use (and togehter with AppleHDAEnabler? )
My EP35-DS3P's ALC889a is still working fine.
I think we all have same DSDT config for 889A = 885 / layout id 12 (x0C)
EDIT: Working now with 10.8.3 AppleHDA - i deleted upated 10.8.4 and installed again 10.8.3 (KextWizard).
Perhaps at first install (i didnt removed the overwitten 10.8.3 by 10.8.4 HDA before using Kextwizard with 10.8.3) something went wrong.