It looks like it thinks you are sending the CustomFieldSerializer itself over the wire, so wants to find a serializer serializer... The extra prefixed package name "com.google.gwt.user.client.rpc.core" indicates that it wasn't able to find your field serializer in the normal package where it should be - consider knocking off that part and just make a com.googlecode. objectify.impl.ref.StdRef_CustomFieldSerializer with the appropriate static methods.
In my brief re-read, I'm not seeing anywhere where the serializer gets passed in as a class to find another serializer for it - this fits with my previous experience where you just create a serializer and let RPC invoke it, no questions asked. -- You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. To view this discussion on the web visit https://groups.google.com/d/msg/google-web-toolkit/-/tJjbxzgYxeUJ. To post to this group, send email to google-web-toolkit@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
