Noticed since I upgraded to 4.1 that the ATV intro sound is gone and that was on ATV 3.0.
Over the weekend I upgraded from ATV3.0 to 3.02. During the upgrade the intro sound was back but once I applied the ATVFlash patch stick it was gone again. The upgrade was successful and I didn’t have to resync anything in XBMC from my external Drobo box or anything from my external WD drive with all my ATV content. I had to rerun the smart installed, Crystal HD installer, download XBMC’s latest SVN (which I like that is listed there now) but everything was running just like it was before the upgrade, perfect minus the intro sound missing.
So the upgrade does work which I was hesitant on doing in the first place but I was bored.