One of the options in the export window is "include data supplied by other players", which is intended to differentiate between world data downloaded from the server, and that received from another player (or imported from an xml file). Since previous versions of the client didn't make this distinction when importing data, if you have ever previously imported any world data directly into the client, that data will always be exported regardless of the setting of "include data supplied by other players". You can correct this by deleting the game from the client game list, and allowing it to fully redownload (then importing the xml file again).
DavidVersion 0.91:
* Added "Export / Share" menu to provide easy in-game sharing of
selected turn data with allies.
* Messages now include a turn number in addition to the date.
* Added a game preferences tab for customizing message list
columns.
* Import menu now accepts text reports as well as XML files.
* Added "snap to grid" map option.
* Added "delete game" option from main window.
* Selecting a map option from the pulldown menu, like world color,
enable torque, or snap to grid, automatically sets that as the
default for future sessions.
* Changed internal mechanism for storing messages.