Ha! Take that, HTML!! In your face, Flanders!
Since the switchover to Blogger II: The Wrath of Khan, I've noticed that when I use the <blockquote> tag, it screws up the formatting of everything that comes after the closing </blockquote> tag. But now I discover that sticking a paragraph (<p>) tag right after the closing </blockquote> tag seems to fix things. Okily-diddily-doo!!