polidori has an exerpt (and a whole story) that opens a "cite" tag and does not close it. Not a mistake I would ever make being the l33t html h4X0r that I am. Oh no.
It looks fine on my machine (which knows to close the cite tag at the end of the paragraph), I'm using firefox on debian, so try firefox.
I don't know what the correct behaviour is, it's probably undefined.
http://www.beyondsampled.co.uk