Corrected entry: At Henneth Annun, Sam suggests to Frodo to use the Ring to escape. Frodo and Sam are sitting in front of three barrels and also in the room are sacks, a crate and candles burning behind them. When Faramir arrives, Frodo and Sam are now sitting on blankets, there are no barrels in sight, the walls are different, there is an extra crate, with food on one and the candles are grouped differently. (01:52:45 - 01:53:45)
Corrected entry: In the Oliphaunt scene, when the Oliphaunt starts going mad, you can see one of its feet pass right through a little group of Southrons. (01:44:45)
Corrected entry: As the Uruk-hai run along with Merry and Pippin on their backs, Merry pulls the Elven brooch from his cloak with his teeth and throws it to the ground, hoping Aragorn and anyone else tracking them will find it. In every subsequent scene with the Uruk-hai, into Fangorn Forest, and at the Entmoot, Merry still has his Elven brooch fastening his cloak at the throat.
Corrected entry: In Fellowship, we see that the boat carrying Boromir's body and weapons toppled on it's plunge over the falls of Rauros. In Two Towers, when Faramir gazed upon his brother's body, the boat appears to be intact, the sword and shield are still in the same position and Boromir seems more or less peaceful (despite his head facing a different way from the last film).
Corrected entry: In the opening scene where Gandalf is falling with the Balrog watch his hair; obviously, when falling at that speed, his hair should be pointing straight up for the whole scene (or behind him depending on his position) but for almost the whole falling scene, his hair is on his shoulders and not moving very much. (00:03:00)
Corrected entry: Gandalf, Aragorn, Legolas and Gimli first approach Edoras, and Gandalf talks about the king's mind being overthrown. It then cuts to inside the Golden Hall, where Eowyn is telling her uncle about his dead son. She is wearing a gray dress, and her hair is pulled back on the sides. Then it cuts back to Gandalf and Co. riding up to the town, then back to Eowyn tending to her dead cousin. This should only be a few minutes later, as the group is still riding up to Edoras, but now Eowyn has on a white dress, and all her hair is down. She then goes outside in her white dress, and sees the group approaching.
Corrected entry: When Faramir shows the hobbits and Gollum how they can leave Osgiliath, he says that the sewer "runs right under the river through to the edge of the city". Why would anyone bother to build a sewer under the river? Their job is to discharge waste into the river to be carried away. (01:37:40)
Corrected entry: In the scene where Gandalf and company arrives at The Golden Hall in Edoras and Gandalf prepares to end Saruman's hold on Theoden, Gandalf can be seen wearing the leaf brooch on his cloak, keeping it intact, like the rest of the now split up fellowship. But then the wizard discards the cloak to reveal his white robe as if nothing held it in place.
Corrected entry: After the Entmoot, Pippin convinces Treebeard to take them south toward Isengard. Ents have long legs and can travel at a pace equivalent to a briskly walking human. The Entmoot was also obviously nowhere near Isengard, as some of the Ents would otherwise have blundered on to the destruction beforehand. So we can take it as written that Treebeard carried Merry and Pippin some distance south before finding the scene of destruction. In that time, all the other Ents would have been travelling back toward where they came from - ie, not in the same direction that Treebeard was moving. However, when Treebeard discovers what Saruman has been doing, he sends out the call to all the other Ents - and they immediately walk out of the forest.
Corrected entry: When Aragorn, Legolas, and Gimli first enter Fangorn Forest, they leave their horses behind. Then, when they leave the forest with Gandalf, after Shadowfax comes and Gandalf says "He has been my friend through many dangers," they all ride off together. Arod and Hasufel just come out of nowhere.