ok, for some weeks now, I've been getting this sporadic error where I start navigating through a file and I get errors such as this:

unknown &KEY argument: :|PRI^DNT-RIGHT-MARGIN|

obviously, the ^D in the middle of print-right-margin isn't right. But it's not just print-right-margin, yet it always seems to be a ^D. Has anyone else seen such a problem? I'm running on a threaded version of SBCL (1.0.10.29) for MacOS with a reasonably recent carbon emacs built from CVS (current head doesn't run, but that's another story; perhaps emacs is the culprit here).

Thanks,

Cyrus