An example from the Create-an-Upset thread, courtesy of Durron597:
http://twodimes.net/h/?z=453927
pokenum -h ac ad - 8h 8s - as kc - ah kd - ks qc - kh qd - qs qh - 2c 2d - 3c 3d
Holdem Hi: 278256 enumerated boards
cards win %win lose %lose tie %tie EV
Ac Ad 79140 28.44 196174 70.50 2942 1.06 0.287
8s 8h 81534 29.30 195042 70.09 1680 0.60 0.294
As Kc 2298 0.83 273016 98.12 2942 1.06 0.010
Kd Ah 2298 0.83 273016 98.12 2942 1.06 0.010
Ks Qc 30 0.01 257914 92.69 20312 7.30 0.034
Qd Kh 30 0.01 257914 92.69 20312 7.30 0.034
Qs Qh 0 0.00 276576 99.40 1680 0.60 0.001
2c 2d 40258 14.47 236318 84.93 1680 0.60 0.145
3c 3d 51094 18.36 225482 81.03 1680 0.60 0.184
This is pretty mild, too. I just thought it was droll that it happened to have 8s as the favorite.