I've lost with quads twice now. First time was this hand:
Starting hand #1127828988
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NEW HAND
NTufnel posts the small blind $0.10
jadaf7 posts the big blind $0.25
DEALING POCKETS
Dealt to ThirteenLisk (2h, 2c)
pastafarian folds
Telma calls $0.25
ThirteenLisk calls $0.25
fubarvet calls $0.25
Wacarnld folds
13ofSpades calls $0.25
string folds
NTufnel calls $0.15
jadaf7 checks
DEALING FLOP (3h,Kc,2d)
NTufnel checks
jadaf7 checks
Telma checks
ThirteenLisk checks
fubarvet bets $0.65
13ofSpades calls $0.65
NTufnel folds
jadaf7 folds
Telma folds
ThirteenLisk raises $0.65 to $1.30
fubarvet folds
13ofSpades raises $1.70 to $3.00
ThirteenLisk raises $5.00 to $8.00
13ofSpades raises $12.00 to $20.00
ThirteenLisk goes all in $5.75
$6.25 is not called, return back to 13ofSpades
13ofSpades shows Three of a Kind, Threes
DEALING TURN (3c)
DEALING RIVER (2h)
ThirteenLisk shows Four of a Kind, Deuces
13ofSpades shows Four of a Kind, Threes
Hand 1127828988: 13ofSpades wins main pot($28.20) with Four of a Kind, Threes
Not sure if it really counts since I was drawing dead when I got it on the river. About a week ago I also lost quad queens to quad kings in 5-card draw online. Sadly I don't have a history for that though.