When the anvil is falling if it hits a tripwire it will appear broken/damaged for about a couple frames. This may happen with other things that anvils can pass through i just happened to notice this. This is a falling sand entity and i spawned it in using command blocks. (you can see them in the image.)
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Blah, no its not. I checked and nobody has reported anything like this yet. The anvil is appearing to become slightly damaged when it passed through the tripwire. THAT is what i am reporting.

Is this still a concern in the current Minecraft version? If so, please update the affected versions in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases. If this has been done, we can reopen the issue.
Keep in mind that the "Resolved"-Status on this ticket just means "Answered", and that we are waiting for further information on whether this issue still exists or not. We will reopen it as soon as the requested information has been delivered.
I checked it again in 1.8.1-pre3 and it does not happen anymore.
Duplicate of MC-1298