Difference between DIV as-is and a SPAN with display:block

Question

Is

different from in any way?

They render just fine the same. Any semantic difference b

Answer 1

Yes they are different.

Even though you style a span with display: block you still can't put block-level elements inside it:

correct
wrong

The (X)HTML still has to obey the (X)HTML DTD (whichever one you use), no matter how the CSS alters things.