Comment Indexer and Intense Debate

I have the Intense Debate plugin activated across all blogs in my network as well as the comment indexer plugin. However, none of the comments left through the intense debate interface show up in the wp_site_comments table, although they appear in the appropriate wp_#_comments tables. I presume that the plugins are clashing somehow such that intense debate hooks into the new comment function somehow without handing it over to the comment indexer, but I do not know enough about how this works to identify the problem.