Does Quake have a problem reading many Impulses at once?   As far as I can tell if two are called simultaneously it may reject one of them?  
If, for example I did something of this sort
bind a +walking_left
alias +walking_left "impulse 19; +moveleft"
alias -walking_left  "impulse 19; -moveleft"
bind d +walking_right
alias +walking_right "impulse 18; +moveright"
alias -walking_right  "impulse 18; -moveright"
If I were to press A and D at the same time, as far as I can tell, the impulses come out all screwy.    Any Idea?
			