title: gae 1.7.3 update -> java.io.InvalidClassException
body: <p>i just updated the Java GAE SDK to 1.7.3 and now i get exceptions, when trying to read from my local datastore:</p>
  
  <pre><code>INFO: Failed to load from the backing store,
  C:\Users\&lt;user&gt;\Documents\myproject\war\WEB-INF\appengine-generated\local_db.bin
  java.io.InvalidClassException:
  com.google.appengine.repackaged.com.google.io.protocol.ProtocolMessage;
  local class incompatible:
      stream classdesc serialVersionUID = 2691625986599730786,
      local class serialVersionUID = -3428150205257072157
  at java.io.ObjectStreamClass.initNonProxy(Unknown Source)
  at java.io.ObjectInputStream.readNonProxyDesc(Unknown Source)
  at java.io.ObjectInputStream.readClassDesc(Unknown Source)
  </code></pre>
  
  <p>Which prevents me from reading entities from my existing local datastore.
  If i downgrade to 1.7.2 it works again, but i would like to run with the latest version.</p>
  
  <p>Anyone know how to solve this? Thank you.</p>