Redstone torch clock behaviour

Verification builds:
1.2.5.15 Retail

Summary:
Redstone torches will create a clock circuit in certain cases, if the torch in the setup is broken and replaced. Compare the behaviour to the Java version.

Steps to Reproduce:
Example 1:

1. Setup the comparator as shown in the screenshot:
   
2. Place an item in the chest
3. Break and replace the redstone torch

Example 2:

1. Setup a stable circuit as pictured:
   
2. Break and replace one of the redstone torches

Observed Results:
The circuit now acts as a clock.

Expected Results:
In example 1, the output of the comparator should simply cause the redstone torch to become unpowered, instead of creating a clock circuit.
In example 2, the circuit should not begin acting as a clock.

Screenshots/Videos attached: Yes

Notes: