I did the fresh install with the latest MM and SM and here's what I see with
MY STYLE of binds, which I will detail as well.
As you can see, it's working. Now, how do I do it?!?
In your ../steam/steamapps/
USERNAME/counter-strike/cstrike/cfg folder, either edit your autoexec.cfg to include:
alias "bet_t_all" "say bet t all"
alias "bet_ct_all" "say bet ct all"
bind "LEFTARROW" "bet_ct_all"
bind "RIGHTARROW" "bet_t_all"
Or, if you don't use an autoexec.cfg, here's one with this info in it.