Load URL and notice that Safari shows 1px with red color next to dt/dd. This rounding problem only occurs when the parent (in this case <dl>) has a dynamic width. Changing from 60% to e.g. 600px will make it work fine in Safari.
The linked url 404s for me, and there are no further details of the problem, so I'm going to mark the bug as invalid. If there is still a problem, please reopen the bug with a testcase illustrating the problem (and please attach it to the bug instead of linking to your site).