[ERROR] Unable to load class 'com.google.gwt.validation.rebind.GwtSpecificValidatorGenerator'

Guys, could you please help me understand why I cannot compile my old project ? It worked with 2.4.

Here is the error I get

Loading inherited module 'com.test.courierApp.AdminPanel'

   Loading inherited module 'com.google.gwt.user.User'

      Loading inherited module 'com.google.gwt.editor.Editor'

         Loading inherited module 'com.google.gwt.validation.Validation'

            [ERROR] Unable to load class 'com.google.gwt.validation.rebind.GwtSpecificValidatorGenerator'

Full call stack is here: http://pastebin.com/raw.php?i=Y50FdfFX

It drives me crazy. I have no references to this missing class. AT ALL. I search EVERY FILE on my entire hard-drive :(

And just in case here is my module file: http://pastebin.com/raw.php?i=z33TdWnU

Please help :(

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