I am on my second Droid now (first one would just auto restart every couple minutes for some reason), but I have noticed that on both units that the 3.5mm audio will crackle on the right channel (if at max/near max volume on the device).
I just turn the device volume down to half and turn up the volume on the speakers -- It is not a real big issue but I was just wondering if anyone else noticed the same problem.
To replicate problem:
It does not seem to do it with headphones. I only notice it on amplified speakers (stereo, car, etc)
I used Pandora (on High quality) and standard MP3s played through the default media player.