Actually, a look through error_log (duh! should have done this before)
[Thu Apr 21 13:24:23 1994] httpd: caught SIGSEGV, dumping core
[Thu Apr 21 13:25:14 1994] httpd: caught SIGSEGV, dumping core
There are tons of these. At first I thought this might be the
culprit, but in testing this theory out, I found it didn't always
correlate to those lags. However, it DID correlate to someone
accessing our site via Lynx (2.2) when looking at a page which uses
the server-side includes, which we are using heavily here for
copyright notices. The document still gets delivered to Lynx, only
without the copyright notice (which is a very bad thing). I also
couldn't find a core file it said it was producing.
This does sound like two distinct bugs, but it wouldnm't surprise
me if they were related.
Apologies if this was already discussed and fixed... but if not, this
seems pretty serious.