[stupok]

What I was trying to say is that I hold down the forward key, get up to speed, and push jump. I make sure not to move the mouse or be on a slanted surface or press any other directional keys. When I do this the jump is sometimes straight ahead, but if I face a different direction and repeat the process the jump is slightly off. I think it might have to do with your set_speed function, or the user's jump velocity just isn't straight ahead...

I think the jump should be in line with the user's current velocity, not where the client is aiming, but do as you wish.