super-source backward compatibility problem?

We have some emulated classes of our own. It looks with 2.7 the super-source tag overrides the emulated classes that comes with GWT. Is there a solution to this?

 Resolving com.google.gwt.cell.client.FieldUpdater
      Found type 'com.google.gwt.cell.client.FieldUpdater'
         [ERROR] Unable to find class java/lang/Object
         [ERROR] Unable to find class java/lang/Object
         [ERROR] Unable to find class java/lang/Object
   Resolving com.google.gwt.cell.client.ValueUpdater
      Found type 'com.google.gwt.cell.client.ValueUpdater'
         [ERROR] Unable to find class java/lang/Object
         [ERROR] Unable to find class java/lang/Object
   Resolving com.google.gwt.core.client.AsyncProvider
      Found type 'com.google.gwt.core.client.AsyncProvider'
         [ERROR] Unable to find class java/lang/Object
         [ERROR] Unable to find class java/lang/Object
         [ERROR] Unable to find class java/lang/Object
         Resolving method get
            Found type 'com.google.gwt.core.client.Callback'
               [ERROR] Unable to find class java/lang/Object
               [ERROR] Unable to find class java/lang/Object
               [ERROR] Unable to find class java/lang/Object
   Resolving com.google.gwt.core.client.Duration


hundereds of other error others like this

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