I normally have my MBP on full (or mostly full) volume, but when I plug in headphones, I drop it down to the absolute lowest (or one up from that) level. Anything higher than that is deafening with my headphones. Normally my MBP automatically dropped it down to about that level whenever I plugged in headphones, but recently its only been dropping it down to the halfway point. This causes momentary deafness as I hit play on my iTunes, forgetting its only halfway down, and additional deafness from the clicking as I frantically hit Fn-F4 to lower the volume. Is there a way I can set the default level that OS X drops the volume to when I plug in my headphones?