Hmm. My issue with this is that the dl is containing in a div with varying width. I’ll suppose I’ll just set the dd width to the minimum for IE8 and it simply won’t expand to take up all the horizontal space…
Now I just need to force a new line after each dd. As it stands, with the dd set to the minimum width I end up with multiple dt/dd pairs per ‘row’. 
Many thanks both of you!