I thing its a problem with any un-rooted phone, or it has been with my S3 since ICS. im currently on 4.1.2 via official firmware update.
I'm actually looking up at the mo how to root, I dont really want a custom ROM but I have a few apps that dont have full function unless I root. That swift key issue being one of them.
This whole rooting thing is confusing, dont know how to go about it, I dont want to void warranty, and im not sure if it's device specifice or Android version specific, and I certainly dont want to brick my phone!