$12 AKs call all-in on bubble?

[sixfour]

Original raiser hasn't to the best of my knowledge done anything unusual, so this minraise seems a bit odd. Shover is 2+2 and knows who I am. Note the stacks, both players just have me covered. Call or fold? Whatever you do, what's your calling range?

Full Tilt Poker
No Limit Holdem Tournament
Blinds: t250/t500
4 players
Converter

Stack sizes:
UTG: t3160
Button: t3450
SB: t3460
Hero: t3430

Pre-flop: (4 players) Hero is BB with K[img]/images/graemlins/spade.gif[/img] A[img]/images/graemlins/spade.gif[/img]
UTG folds, <font color="#cc0000">Button raises to t1000</font>, <font color="#cc0000">SB raises all-in t3460</font>, Hero?