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Hiya.
The second menu item provided by nodewords_bypath_menu() links to admin/content/nodewords/path/list. This page looks very much like the list of rules seen at admin/content/nodewords/path, except that the list itself is not displayed - instead the word "Array" is printed.
Easy suggestion: get rid of that menu item. Slightly harder suggestion: make the list of rules show up on admin/content/nodewords/path/list.
Let me know if you'd like me to work on this.