Rebuilding styles does not help. There is a working CSS file and the forum looks like it should.
Because this is a copy of my live board, I still had a replacement variable for clientscript in place, which made the JS files unreachable. Removing this did not solve the problem, but now the links for 'history', 'edit', 'watch', etc are replaced with one 'more...' button.
In my showthread and forumdisplay template I did remove the forumheader edit of NuWiki, as that's needed to uninstall.
Because the Wiki forums do not display nice like my other forums, I tried disabling Sorky - subforum manager. That had no effect, so I re-enabled it again.
I sent you login details.