Remember the episode in season 3 where Locke blew up the sub? Eagle-eyed viewers spotted that Locke was wet after the explosion, and why would he have been wet UNLESS he had actually hidden the sub somewhere, swam back, then blown up something else to make it look like he'd blown up the sub? People posted images with "COULD THIS BE THE HIDDEN SUB!?" circled and many were CONVINCED that it would turn out Locke had really just hidden the sub.
But two seasons later it hasn't been revealed that Locke hid the sub and I'm pretty sure it's never going to be.
I think the picture frames changing and the missing guy in the Dharma pic are the same as this. Simple scene to scene continity errors. If they actually were important plot points then they probably would have been accompanied by the dramatic "THIS IS AN IMPORTANT PLOT POINT" music as important plot points usually are. I'm 50/50 on if the girl seen standing behind Sun when she was talking to Christian (in the episode with the Dharma photo) was also just a mistake, though I think that could turn out to be something (Claire.)
Of course I'd be happy to be proven wrong in season 6 when the mystery of the changing photo frames and the random missing dharma guy are addressed in dramatic fashion!
But two seasons later it hasn't been revealed that Locke hid the sub and I'm pretty sure it's never going to be.
I think the picture frames changing and the missing guy in the Dharma pic are the same as this. Simple scene to scene continity errors. If they actually were important plot points then they probably would have been accompanied by the dramatic "THIS IS AN IMPORTANT PLOT POINT" music as important plot points usually are. I'm 50/50 on if the girl seen standing behind Sun when she was talking to Christian (in the episode with the Dharma photo) was also just a mistake, though I think that could turn out to be something (Claire.)
Of course I'd be happy to be proven wrong in season 6 when the mystery of the changing photo frames and the random missing dharma guy are addressed in dramatic fashion!