http://blogs.msdn.com/stoey/archive/2007/09/07/sharepoint-2007-blogging-tweaks-rich-text-blog-comments-and-multiple-category-selection.aspxWell that was easy! Thanks to an internal thread by Lawrence Liu on configuring rich comment support in SharePoint 2007, and Live Search for pointing me to a post by Ricky Spears on configuring SharePoint 2007 to support multiple categories , I've fixeden-USCommunityServer 2.1 SP1 (Build: 61025.2)