I had the same problem but i fixed this by having my twitch stream muted in the browser. The cause of this loop is if you have system sounds enabled and you are watching your own stream Minecraft will be taking all sounds from your computer including from your browser and therefore streaming those sounds. If this isn't very easy to understand I am sorry, someone else could probably word this better but I hope this helps you! ~Rhino
I also found this. I even tried activating the dispenser with a button and had no luck. I am using 13w01b.
Same here. :/
I'm sorry. I had confused this with the first sound played when taking fall damage.
There is no need. It was fixed in 1.4.5 🙂
Same here. And I'm on 1.4.5
Command block gamemode changing works fine for me, I can't seem to reproduce it.