Interesting. I'm now experimenting with "H&J" on some pages of mine that have fairly long, side-by-side columns of text. I haven't decided yet whether I'll stick with it. It's a bit disconcerting, albeit not at all surprising, that Hyphenator.js sometimes yields three or more hyphenated lines in succession. I'll probably run my pages by some friends and ask whether they find them more readable with or without "H&J" - unscientific but maybe good enough for my purposes.