Fulio said:
I'd better go and validate it first.
Indeed that had been recommendable, to speed things up.
There are Chinese writing in the
page. It is hard to understand without knowing the language and
writing.
What really makes understanding harder is that you are not telling what the
problem is (and why you assumed it was related to nested spans).
Open the page. Click the 'PinYin button. In the rectangle,
the problem is with the last three spelling.
The last three _what_? The last three syllables? "mao2 ze2 dong1", with the
numbers as superscripts? What's wrong with that?
Opening with different
browsers, you will see the displays are not same.
Different browsers should be expected to be different. What is the problem?
The text is the same on IE 8 as on FF 3, for example, except for the font.
There are markup errors, a CSS problem, and a JavaScript problem, but these
need not have anything to do with the problem.