If you shrink your browser window so that it's no wider than about 700 pixels or so, and visit the link: http://www.dndarchive.com/index.php?option=com_kunena&Itemid=22&func=view&catid=27&id=123#123 The message board's pages end up broken. Half of each message is cut off, and the page does not correct if you then maximize the browser window. Visiting the same link, without an anchor, with the browser window still shrunk in terms of width does not cause the boxes to be horizontally cut off: http://www.dndarchive.com/index.php?option=com_kunena&Itemid=22&func=view&catid=27&id=123
confirming on a recent trunk nightly and happens also on 1.9.0/Fx3 builds, but not on 1.8.1/Fx2. reflow issue?
This is probably the same issues as bug 325942. The middle column is wrapped in a div (#col1pad) with overflow: hidden.
looking at that bug & its dupes you're right => duping this one against it too.