Some properties of a WordPad document may not appear in Windows Vista
In Windows Vista, when you view the properties of a WordPad document that was created in Windows XP, some properties may not appear.
This problem occurs if the document was created by right-clicking the desktop, pointing to New, and then clicking WordPad Document. When you do this is Windows XP, the WordPad document uses the .doc file name extension.
For more information on this issue, including potential causes, workarounds, and resolutions, see: Microsoft KB Article KB2534480.