I was bombarding a Chinese city with a destroyer, when after the next turn, Chinese declared peace with me. After ending another turn, I got the "Are you sure you want to do this?" prompt because my destroyer was still bombarding the city. No matter how many times I clicked "no, perhaps we should reconsider", the prompt would not go away until I clicked "Do what i say!". Just a FYI in case no one has seen this yet...

Well your not the only one!!! It didn't matter in the end though.