If you look at your code with Firefox’s Firebug you will see that generated paragraph is getting wrapped in progress span classes. You have style7 wrapped around style3 wrapped around style6 wrapped around a UL and LIs.
I bet each of these have some CSS font size declaration that is progressively shrinking that text. It does not even show inn Firefox but does in Safari (although you cant read it.) This size reduction is getting its input from multiplying the various sizes.
I think you need to redo the text sizes in your CSS. Be careful of spans within spans etc...