String/Text field is not visible

After I click to add primitive field of type Text or String the message 'Path mynamespace:string already exists, not adding field' is displayed although the field is not visible as such. Looking at the console the field is found with the wrong type (Text for String and vice-versa).

STEPS

• Add a new namespace mynamespace
• Add a new document type doctype_one
• Insert a String and change its values Caption and Path to String1, string1
• Insert a Text and change its values Caption and Path to Text1, text1
• Insert a String, and move it to the top
• Insert a Text
• Delete both Text and String
• Insert a String
• Insert a String

In the tomcat console:

25.02.2010 11:44:22 ERROR [org.hippoecm.frontend.plugin.config.impl.JcrClusterConfig$PluginList.add():171] /hippo:namespaces/mynamespace/doctype_one/editor:templates/default/string
25.02.2010 11:44:22 ERROR [org.hippoecm.editor.type.JcrTypeDescriptor.addField():199] failed to resolve path null relative to node /hippo:namespaces/mynamespace/doctype_one/hipposysedit:nodetype/hipposysedit:nodetype: empty path