On the second scenario of Ghenghis Campaign when you must kill a traitor, didn't the computer resign after some time and when the objectives were not completed?
Another bug related to resigning is the Barbarrosa campaign when all the Goths must be destroyed and at the same time protect the allies which give you resources. I guess its the 2nd or 3rd scenario.
And to finish, doesn't the 3rd scenario (Into China) of Ghenghis Kahn gets choppy after you've found the peasants, battering ram and mongonel?