I think I've found a redstone bug in snapshot 13w03a. However, I'm not sure if it is a bug or intended to do so. If it is intended to do so, I am sorry that I made a useless issue. The pictures I've attached explain enough I think
Edit by Anon Ymus:
The comparators look like they are locking the repeaters although they aren't.
Related issues
Attachments
Comments

Confirmed. The bug lies in the fact that the comparators are technically outputting an output, but that output has a signal strength of 0.
Further testing reveals that the comparators do actually lock the repeaters if they are powered from the side by a torch, not a repeater.
Duplicate of MC-6640, please use the search function to see if your bug has already been submitted. Currently over 45% of tickets are being closed as duplicate.