Audio problem: When Maxim gives Mrs. De Winter the bunch of flowers, right after they are married, she says a few times "lovely", the last time she says it, her mouth is closed.
Audio problem: While the couple are watching their honeymoon films, a different Joan Fontaine voice can be heard; it is deeper, distorted. The voice says, "Ah, yes, that's very nice."
Chosen answer: Maxim was previously married (unhappily) to Rebecca, who died tragically and under rather mysterious (and suspicious) circumstances, sparking rumors. Maxim thinks his new wife is referring to that, but she knows nothing about it and was only making an innocent remark, unaware of the rumors. The "rude, hateful" part probably refers to the "dull and gauche and inexperienced" comment - she probably thinks that is what caused his reaction, rather than the "gossip" comment, given she doesn't know the rumors. She is very young and naive and feels inadequate as the wife of a wealthy man. Maxim is older, intimidating her somewhat, and she was confused by his angry outburst.
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