If the original table does not contain table headers (no <th> tags is used), the exported version will have table headers in the first line

Live example: the tables on the doc site do not necessarily contain table headers.

See the attached screenshot.

Steps to reproduce

1. Create an article containing the following text in the article body:

<table>
  <tr>
    <td>username</td>
    <td>The MySQL user (if no user is set up, use "root").</td>
  </tr>
  <tr>
    <td>password</td>
    <td>The password that belongs to the username.</td>
  </tr>
  <tr>
    <td>database</td>
    <td>The name of the database, for example "my_database".</td>
  </tr>
</table>

2. Select "Export OpenOffice.org" using the context menu and open the generated OOo file.