My only quibble with the proposal is the font size on the cover page.

我對這份提案唯一的小意見是封面的字體大小。

The client raised a minor quibble about the delivery date, but signed the contract anyway.

客戶對交貨日期提出了一點小挑剔,但還是簽了合約。

Apart from a small quibble over hotel breakfast hours, the conference trip went smoothly.

除了對飯店早餐時間有點小抱怨之外,這趟出差開會的行程很順利。