HRDに移行したところ、自分のBLOBにアクセスできないと表示されました...
Uncaught exception from servlet
java.lang.SecurityException: This application does not have access to that blob.
at com.google.appengine.api.blobstore.BlobstoreServiceImpl.fetchData(BlobstoreServiceImpl.java:200)
at com.droidastic.telljokes.server.servlet.ServeBlobsServlet.checkBlobKeyExists(ServeBlobsServlet.java:100)
at com.droidastic.telljokes.server.servlet.ServeBlobsServlet.doGet(ServeBlobsServlet.java:64)