It seems like more often than not, unless I've just rebooted, my Droid X won't play sound through the headphone jack. I generally notice this when I stick it in my car dock (which is where I do most of my listening to music and audio books).
Does anyone else have this problem? It seems to have started after upgrading to the rooted .596 update.
I haven't found any sequence of events that causes the jack to stop working, and haven't found any settings that seem to bring it back to life without rebooting the phone.