title: symfony 1.4.5 build-model error of duplicate table
body: <p>i added a new mysql table and did a build-schema my config/schema.yml contains my new table
  now when i run the build-model i get: 
  Some problems occurred when executing the task:                                </p>
  
  <pre><code>build-propel.xml:474:20: Duplicate table found: propel.                                                                      
  
  build-propel.xml:461:22: Execution of the target buildfile failed. Aborting.
  </code></pre>
  
  <p>If the exception message is not clear enough, read the output of the task for<br>
    more information                                                     </p>
  
  <p>how on earth must i find the duplicate table??
  please help?
  thank you</p>