Okay, I'll add that to my list.  I wanted to try a few chosen at random, too, in hopes that I might run into ones with stubborn markup problems.  If the ones I've chosen are too easy, I'll just pick a few more at random.

I can't remember which SRFIs off-hand, and I wouldn't name names anyway, but I am certain that I have seen some awful markup in some of the SRFIs.  (To be fair, good-looking, clean markup has never been a goal or a requirement for SRFIs.  It's just that I, as editor, see the innards of the documents more than most people.)