I upgraded my S3 to Android 4.0.4 yesterday on Rogers in Canada and it's running even better.
The only issue I noticed is regarding the vibration notification form the native email app. I used to not get notified when I was on a call and an email comes through. Now, it vibrates every time i get an email while on a call. i did find the setting in the email app to remove the vibration notification but it removes it completely even when not on a call and also when it's in vibrate mode??
for Gmail it's working well, only get a silent status bar notification which is what I want.
does anyone experience the same? let me know what I should do. it's frustrating to get that vibrating noise while on a call. i did try the kill the duck app but it didn't work....