I've just tried d3forum with 2.0.16 from xoops.org
The result... it works perfectly.
Have you fixed the bug of 2.0.16?
http://xoops.peak.ne.jp/md/news/index.php?page=article&storyid=354My modules cannot work with the BUG in 2.0.14/15/16 from xoops.org
Fix it