No, you haven't misread the title nor is it a typographical error. It is what it says, 3BS. If you don't know the meaning of the abreviation "b.s." then you need to get out more or play some CoD online.
One of the new features of the 3DS is the ability to suspend games and software and allow you to access another program while keeping your current game progress intact. But apparently a number of users are getting an error message instead.
Of course Nintendo being Nintendo, the message displayed is completely unhelpful telling you there is a problem and you need to turn your 3DS off. Don't fret as it does not cause harm to your game data or breaks your 3DS.
It has been reported that these error messages have appeared while playing Asphalt 3D, Super Monkey Ball 3D and Super Street Fighter IV 3D Edition.
Here we have another reason to not get a game system at launch. Though I still want a 3DS right now... *drool*