Dedalos, check the skins & sounds forum. Skychimp hosted Waffle's soundpack, and I loaded it up from there. Look through the files you get carefully...he includes a nice little set of optional sounds to choose from, like a selection of check-six's, a selection of base attack warnings, etc...
No problems with the update here. Had the Wafflepack loaded up prior, and required no adjustments after the update.
Actually, a couple of sounds that were not coming through before (special deep, boomy explosions for heavy bombers) are now coming in great.
Good Luck