.5/1, bad river call?

[captainwan]

BB is 12.5/12.5/oo after 8 hands

Party Poker 0.50/1.00 Hold'em <font color="#0000FF">(6 handed)</font> link

Preflop: Hero is SB with 9[img]/images/graemlins/club.gif[/img], A[img]/images/graemlins/club.gif[/img].
<font color="#666666">1 folds</font>, MP calls, <font color="#666666">1 folds</font>, Button calls, Hero completes, BB checks.

Flop: (4.00 SB) T[img]/images/graemlins/club.gif[/img], 9[img]/images/graemlins/spade.gif[/img], 3[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(4 players)</font>
<font color="#CC3333">Hero bets</font>, <font color="#CC3333">BB raises</font>, MP folds, Button calls, Hero calls.

Turn: (5.00 BB) 4[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
Hero checks, <font color="#CC3333">BB bets</font>, Button calls, Hero calls.

River: (8.00 BB) 8[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
Hero checks, <font color="#CC3333">BB bets</font>, Button folds, Hero calls.

Final Pot: 10.00 BB.

Is it a bad river call?