The 'catch the ball'-text made me first realise the difference between lmb and rmb passes though :z ..strangely enough.
Also, I think it might have brought me to the realisation that aiming higher with rmb passes either makes them go at the default height, or not lock at all.
While I have to agree with The_One, I don't think it would hurt putting that in. It would really help in one way or the other.
Make a sign that says "You're being locked on! Expect a pass!" when the player is being locked on.
I know you guys (erm.. davidm and mpratt) are busy, but we have to remember what's keeping this game alive, noobs! Help them and they'll enjoy the game more.