I think people are talking about the XDA thread I linked to a while back. As far as I can make out, changes in 4.4.4 have messed up audio causing huge lag between e.g. skipping tracks in Apollo or Play Music and anything actually registering. For your build of 05/08 and Shabby's build #1 from 07/08, it seemed to work better if you installed
this, which is basically just some proprietary libs from 4.4.2 overwriting the 4.4.4 ones. Shabby has included some sort of fix to the source in his #2 build on 07/08 (and hence in your later builds) which purports to solve this. It also breaks the compatibility with the old libs, so the XDA patch no longer works.
However, I've found Apollo massively unstable in all builds since then (it crashes lots, particularly when swapping back to it when backgrounded), and others seem to agree. I've gone back to build #1 from 07/08 and reapplied the old audio libs patch.
Could it be the new Falcon maintainer
buggering about with msm8226-common?