This happens when I am converting a .prc file to a .mobi . I have found if I uncheck the box and make the change and then check the box the title is changed. This is verified by checking the output box within the GUI and by opening the book. If I leave the box checked the original title is used, discarding my changes. Using the create tool form Mobipocket results in shorted and changed titles, which is why I am using the GUI and mobi2mobi.
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