I think my original post lacked information (apologies). To date steals had been 3x blinds, button's raise looked very suspicious, he was also over-aggressive, I thought SB's call meant he had a very strong hand. I thought the Button played this really badly, but I thanked him politely for the case of beer he'd just bought me.
Party Poker No-Limit Hold'em Tourney, Big Blind is t300 (3 handed)
converter
SB (t4490)
Hero (t660)
Button (t2850)
Preflop: Hero is BB with J[img]/images/graemlins/heart.gif[/img], Q[img]/images/graemlins/spade.gif[/img].
<font color="#CC3333">Button raises to t600</font>, SB calls t450, <font color="#666666">
1 fold</font>.
Flop: (t1500) 4[img]/images/graemlins/diamond.gif[/img], 7[img]/images/graemlins/club.gif[/img], T[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
SB checks, <font color="#CC3333">Button bets t700</font>, <font color="#CC3333">SB raises to t3890 (All-In)</font>, Button calls t1550 (All-In).
Turn: (t7640) 6[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players, 2 all-in)</font>
River: (t7640) 9[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players, 2 all-in)</font>
Final Pot: t7640
Results in white below: <font color="#FFFFFF">
SB has Ac Kd (high card, ace).
Button has Jd As (high card, ace).
Outcome: SB wins t7640. </font>