The shipping version of MindManager 7 (7.0.263 (CD) or 7.0.266(Download)) includes a broken Web Document export bundle. While a separate fix is prepared for general download, you can use the attached file to correct the problem. Follow these directions to install the new export bundle:
1) Download the zip file.
2) Double-clicking on the zip file will result in a folder called "Transformations" to be created in the same directory as the "FixedWebDocument.zip" file.
2a) If you have the Safari preference to "Open 'safe' files after downloading" turned on, you will not have to double-click on the zip file as Safari will do that for you and leave a "Transformations" folder for you.
3) Make sure MindManager is not running.
4) Place the "Transformations" folder at the following location:
(your home directory) / Library / Application Support / Mindjet / MindManager / 7 / English / Library /
or
(your home directory) / Library / Application Support / Mindjet / MindManager / 7 / German / Library /
5) Restart MindManager. The export menu should now contain a "Web Document (Fixed)" entry. Using this exporter should provide the export you expect.