I solved this but am posting it in case it helps someone else. I copied PMModules.js from \Program Files\Adobe\Adobe Contribute CS4\Configuration\Commands to \Documents and Settings\
\Application Data\Adobe\Adobe Contribute CS4\Configuration\Commands I then edited \Documents and Settings\\Application Data\Adobe\Adobe Contribute CS4\Configuration\Commands\PMModules.js so that RUA_TAG_SPECIFIC_ATTRIBUTES, instead of containing ol: { style: 1 }, now contains ol: { start: 1, type: 1 }, so when I import a table from Word having the following Word HTML: