Three days ago, I upgraded WordPress to 2.0. It seemed that there’s nothing wrong at that time. But today, I saw a post (zh-TW) about the compatibility between WP2 and SK2. Maybe because there are few comments and trackbacks in the site, there are no problems even I don’t patch it. But it seems an indeed problem, so I still installed the SK2-WP2 Compatibility plugin. Hope it’ll be ok from now on.