I see lots of wierdness at the micros, but this non call of my all-in surprised me:

PokerStars No-Limit Hold'em, $0.04 BB (6 handed) - Poker-Stars Converter Tool from FlopTurnRiver.com

saw flop | saw showdown

UTG ($3.24)
MP ($2.40)
Hero (CO) ($4.07)
Button ($8.66)
SB ($3.22)
BB ($5.90)

Preflop: Hero is CO with K, K
2 folds, Hero bets $0.16, 1 fold, SB raises to $0.63, 1 fold, Hero raises to $1.79, SB raises to $2.95, Hero raises to $4.07 (All-In), 1 fold

Total pot: $5.94 | Rake: $0.02

Results:
Hero didn't show K, K (nothing).
Outcome: Hero won $5.96