good catch - but I think it worked ok anyway for me.
I often strip these otherwise the chapter names/numbers appear as blue+underline because they look like hyperlinks - and I prefer plain black. my sony reader insists on underlining anything in <a> tags, irrespective of styling
but sometimes there's a horrendous collection of spans & styles all on the same single chapter header line, esp if the opening letter is differently styled, so it can get quite messy