Ok, so this is not exactly a photo anomaly (but I am going to post images
).
On the CSM there is a docking mechanism (arrowed) which connects to the LM via the top hatch behind the rendezvous radar antenna (arrowed)
Now this really might turn out to be a dumb question, but how do the astronauts get past this piece of equipment to move between the CM and the LM? I haven't found a diagram that shows this clearly enough.
Is it attached to the forward hatch door so that it somehow gets removed or swung out of the way?