No, I don't understand why you get that, but I can confirm the problem in Firefox 2.0 (but not in other browsers). Why is it doing this to the singles section, but not to the studio albums section (which also line-wraps). Have you seen this behavior on any other articles using ? (I note also that inserting manual line breaks isn't a good solution, as the content still expands outside the navbox for certain window widths.)