Redstone Torches don't transmit single tick redstone pulses.

Steps to Reproduce:
Normally, when a redstone torch recieves a signal it turns off. If the signal it recieves is stopped for 2 redstone ticks the torch will turn ON for 1 tick. In 1.5 however, the torch now turns on for 2 redstone ticks. They simply don't react to 1 tick changes.

The attached image shows a simple way to reproduce the problem. If the repeater in the back is set to 3 instead of 4, the redstone dust turns off for 1 tick and should allow the redstone torch to turn on for 1 tick. In 1.5 this does not work.