This bug works in 1.0 as well as in 1.1b4
Instruction:
-You have to be a robber
-take the bag and kill all enemies
-wait until "lawmen won"appears (i assume that you are lawmen, but works for outlaws too)
-rob
-now you can see a "outlaws robbed" on your screen and the enemy team get the robbed money
that's quite annoying.