The Menu Manager system commands issue was found and patched for WebAPP version 0.9.9.6 of February 21 2007. See http://www.web-app.org/cgi-bin/index.cgi?action=downloadinfo&cat=pastversions&id=28 for the download with the patch for this. WebAPP is currently at version 0.9.9.7 as of the time of this posting.