Then, I changed one, and couldn't bounce no matter how many times I tried!
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Someone's gotta test this too because it fixes bouncing altogether for me!
Go into either CoD4, or CoD:WaW, and then do "/devmap mp_pipeline" or for CoD:WaW "/devmap mp_downfall", or any other good bouncing map, then do "/set jump_stepSize 0"... ( Enter only blue text into the console! )
Next, just try to bounce, and you won't.

Thanks,