im just the opposite, i think the update cured my crackling audio problem

 

I had the cracking before the update and I still have the cracking.

 

my audio crackles on two occasions:

1) phone volume turned all the way up. i turn it down a notch or two and it goes away.

2) i have a lot of apps running and little memory left. i use task killer to kill everything I am not using and it goes away.

Is it possible that after your update, a volume setting has changed or you are running more apps than before?

 

I think the Droid's memory management includes shutting down some apps when memory gets too low. The question would be whether or not that threshold is above or below the point where it might cause your audio to crackle.

When you notice it, run a task killer (I use Advanced Task Killer) and kill everything except your music app and see if the crackle goes away.