$5 - Do you ever fold a set?

[RoyalStraight]

First post on 2p2 - love the site and all that. You can probably guess what happened, but I need to know if I made the right play on this. I know Harrington says never fold a set, but I had a really bad feeling about this one...

PokerStars Tournament, Big Blind is t50 (8 handed) Converter on pregopoker.com

UTG (t945)
UTG+1 (t1845)
MP1 (t1375)
MP2 (t1765)
Hero (t1840)
Button (t930)
SB (t3460)
BB (t1340)

Preflop: Hero is in CO with A[img]/images/graemlins/heart.gif[/img] 8[img]/images/graemlins/club.gif[/img]
<font color="gray">UTG folds</font>, <font color="gray">UTG+1 folds</font>, <font color="gray">MP1 folds</font>, <font color="gray">MP2 folds</font>, <font color="red">Hero raises to t100</font>, <font color="gray">Button folds</font>, <font color="gray">SB folds</font>, BB calls t50

Flop: (t225) 8[img]/images/graemlins/spade.gif[/img] Q[img]/images/graemlins/club.gif[/img] 8[img]/images/graemlins/heart.gif[/img] (2 players)
<font color="red">BB bets t250</font>, Hero calls t250

Turn: (t725) Q[img]/images/graemlins/diamond.gif[/img] (2 players)
BB checks, <font color="red">Hero bets t100</font>, BB calls t100

River: (t925) 4[img]/images/graemlins/spade.gif[/img] (2 players)
<font color="red">BB bets t890 (All-in)</font>, Hero calls t890