When Wesley enters the holodeck, the hologram of his father is not wearing a combadge. The hologram is then wearing a combadge in closer shots.
Robert hands Jean-Luc a bottle of wine in their parting scene, yet as Picard walks away he is not carrying the bottle. The bottle seems too large to have been stowed in Picard's shoulder bag, and he is not seen placing it there.
As Robert follows Jean-Luc outside before their fight, he picks up a rag or towel and takes it with him. He doesn't appear to have it in his hands as they walk, talk and fight, but it reappears in his hand after their fight and he's sitting on the ground.
The direction of the sunlight during the scenes in the vineyard keeps changing.
The amount of mud on the back of Robert's shirt changes several times during the fight in the vineyard.
Chief O'Brien is wearing 2 pips, like Lieutenant Worf. O'Brien is only a Chief Petty Officer.
Robert and René tuck their napkins into their shirts before dinner. This is considered poor etiquette in formal setting and would certainly not be done by the proud, traditionalist heirs of a vineyard.
However, the Picards seemed to have adopted a rustic, informal lifestyle, wearing working clothes and getting their hands dirty in traditional viticulture and winemaking. This attitude has clearly extended to their dining habits.
Wesley Crusher was born in 2348 and his father Jack died in 2353. In this episode, Beverly says Jack never had a chance to record any more messages to Wesley even though there was a gap of five years in which he could have done so.
All throughout the part whee Captain Picard is visiting his brother grapes are on the vine well before harvesting (harvesting in France is between Sep. and Oct.) In the final scene the boy laying under the tree, the constellation of Orion is visible (late Dec to Mar.)
After the battle with the Borg, repairs to the Enterprise were estimated to take 5-6 weeks. Here, repairs are nearly complete only a few days after the Enterprise reaches Earth. (Some or much of the work could have been done en route.)
(around 4 min) After Counselor Troi leaves the captain's quarters, the camera focuses on Picard with books in his hand. As he retrieves the books from the shelf, the bottom of the boom microphone is visible on the reflective surface of the upper wall display in front of him. Appears again when he returns the book to the shelf.
In most cases, Robert's name is pronounced in French ("Robare"), as it should be. Yet when Jean-Luc tells his brother about his ordeal with the Borg, he once uses the English pronunciation "Robburt".
Jean-Luc pronounces his brother's name "Ro-bare" (usually), but he calls the character Louis "Lewis" and not "Louie".