I did try it, but that won't fix it.
Maybe I have not explain it good enough, so here we go, another explanation of the problem:
Before 1.2 a dispenser filled with 127 arrows in 1 stack would be infinite, if you would fire the dispenser it would simply stay at 127, but still fire the arrow.
In 1.2 a dispenser filled with 127 will simply go down to 126 after a shot, and it will keep going down till it's empty.
Also, a conversion from 1.1 to 1.2 would not work, I also need an infinite mob egg spawner
Here is a nice video showing my game:
http://www.youtube.com/watch?v=BONO3Ui8zAMAs you can see, the whole game is pretty much done, it took us 2 months to complete and I don't want all that time to be wasted just because Jeb decided to do something weird with dispensers