It stays attached, but you don't control it.Your opponent is free to move it when he gets the opportunity. And because he still controls it if it is worded like Argentum Armor They still control the trigger when the creature attacks.
Auras will also remain attached (except when they care about the controller, like Demonic Appetite)technically there are no sides on the battlefieldif you fling the stolen creature the equipment will fall off and remain unattached on the battlefield under your opponent's control
Ok, then that wouldnt equipment fall off too once u have control of the creature because it say " equip to creature u control" [C]Kitesail[/C]=Kitesail.
303.4c If an Aura is enchanting an illegal object or player as defined by its enchant ability and other applicable effects, the object it was attached to no longer exists, or the player it was attached to has left the game, the Aura is put into its owner’s graveyard. (This is a state-based action. See rule 704.)
So, its a matter of when the aura that u mention checks. Ive been trying to find the ruling for "checking"