Wordpress 2.3 has finally released with many new features as what I have posted previously. I have upgraded one of my blog to 2.3. Some of my plugins that rely on category database such as Collapsible Categories & Dtree were all unusable. Wordpress 2.3 does change the structure of category database that breaks all plugin that relies on the old database created prior this new version. Hopefully all the plugin authors will update their plugins to compatible with this version of wordpress.

Whoever uses plugin that relies on database = “categories” & “post2cat” is better not to upgrade to version 2.3 until the plugin developer updates the code.