If you change the sound level in the game, when you restart Minecraft, the sound level will have returned to its previous level, instead of staying where you left it.
MC-4630
Sound level resets
Resolved
Fixed
0
(Unassigned)
Unconfirmed
Minecraft 1.4.5, Minecraft 1.4.7
Minecraft 1.7.2
Retrieved
Please force a crash while ingame by pressing F3 + C for 10 seconds and attach the resulting crash report (in .minecraft/crash-reports) here.