Yesterday (Sept 25th) news site across the web were buzzing with the news that an entrapeneuring type had managed to find an exploit in the Samsung Touchwiz software. It basically allowed foreign code to be run on the phone, without the users authorisation or prompting, that formatted the handset.
You can read more here:
By today (Sept 26th) the same news sites are reporting that Samsung have fixed the loophole and are urging users to download the fix for it. So if you are running a Samsung handset then go check for system updates.
That sort of timescale for bug fixes is admirable, whoever you are.