You’re saying that in landscape mode the audio.stop won’t work?
First of all i reinstalled the latest public and sound is back on!Sorry for the false alarm 
@krystian6 yes in many devices when you press the power button the sound doesnt stop.There is a list in the first post.If you have one of these devices i can tell you a free game to download and see for yourself!
Well refer to this thread http://forums.coronalabs.com/topic/32512-applicationsuspend-event-sent-too-late/
It seems to be When pressing the power button (and thus sending the phone to stand-by), no system event occurs.
So your audio.stop() wont work because it wont be triggered.
The problem only exist in Some Devices, GooglePlay doesn’t care but Samsung AppStore will reject it.
Since its impossible for me to implement Odijack’s solution as mine is a game with too many display groups to rotate, I’ll just wait for CoronaSDK to fix the problem.
Don’t think this is a high priority bug to them, as only a few of us are interested in Samsung App Store.
I went through the thread and from what I understand this is for landscape only.
Thankfully my app is in portrait.
Samsung Apps gives me many more downloads than google play.
I think in Europe, samsung has a fair share of users and most of them do indeed use Samsung Apps instead of google play.
As I’ve said… I’ve got around 40x more downloads every week on samsung apps then google play.
Oh,
I have same issue with ‘Nook Color’ devices.