Since you may not have read the full thread, let me help.
The main discussion here has been about the introduction of Weimann in the 71st minute for N'Zogbia and whether Agbonlahor or Albrighton should have come off instead because they weren't playing well.
I was suggesting the sub was tactical, to change the shape of the attack, so it was a question of taking off a player who wouldn't fit in with the new shape, and that was N'Zogbia.
Barry's Boots didn't agree because he can't accept on principle that Alex Mcleish could possibly think tactically (at least that's what I think he was arguing).
Now, as to the later substitutions, they were both tactical, i.e. not forced by injury.
Bannan came on in the 82nd minute, Gardner in the 90th minute.
In the 92nd minute, Bannan slotted an excellent pass through to Gardner, who shot at goal; Schwarzer fumbled it and Weimann bundled in after two attempts.
If you're saying in some way the substitutes DIDN'T make a difference to this game, I am mightily puzzled, since they combined to create the only goal.
I am waiting with wonderment to hear from you how the substitutes didn't make a difference...