Chapter 34, Practice & Review #16: "If those four soldiers had followed us, we would not have dared to put the weapons on the ship."
The answer key gives:
"Sī illī quattuor mīlitēs nōs secūtī essent, arma in nāve pōnere nōn ausī sumus."
Wait a sec. "Ausī sumus"? Since the condition uses the imperfect subjunctive, surely the conclusion should as well, making it "ausī essēmus"? I can't think of any way the indicative makes sense ...