.5c/.10c, should this always be a raise?

carlop

PokerStars Game #10165706472: Hold'em No Limit ($0.05/$0.10) - 2007/05/29 - 12:21:20 (ET)
Table 'Sarin' 6-max Seat #4 is the button
Seat 2: Frauze ($9.15 in chips)
Seat 3: DOUBLEUPDEAN ($3.60 in chips)
Seat 4: sizu ($20.35 in chips)
Seat 5: poppo72 ($11.55 in chips)
Seat 6: potpouri2 ($6 in chips)
poppo72: posts small blind $0.05
potpouri2: posts big blind $0.10
*** HOLE CARDS ***
Dealt to poppo72 [6c 5c]
Frauze: folds
DOUBLEUPDEAN: folds
sizu: calls $0.10
poppo72: calls $0.05
potpouri2: checks
*** FLOP *** [2c Ts 3c]
poppo72: bets $0.20
potpouri2: calls $0.20
sizu: calls $0.20
*** TURN *** [2c Ts 3c] [8c]
poppo72: bets $0.60
potpouri2: calls $0.60
sizu: calls $0.60
*** RIVER *** [2c Ts 3c 8c] [Ah]
poppo72: checks
potpouri2: bets $0.20
sizu: raises $0.60 to $0.80
hero?

I don't have PT up and running at the moment(i reached the free 1000 hands and haven't got around to buying it) but neither player has done anything drastic. I hate my check on the river in hindsight, i guess i was expecting a little more action behind me (in terms of bet size), but i also thought higher flush was a possibility. Is a flat call way too tight here?

RoadSweeper

I raise to about $2 here.

Looks like he hung round with an A.

however i'd be a little suspicios about the min raise

cooker3

I'd raise every street here