Yes, when loads are high,
"Premature end of script headers" will be left in error.log.
Nothing, no 500 notation, will be left in access.log, even
though 500 is what is sent to the browser.
Thus no clue to what page the user was trying to browse.
Thus one cannot even tell if the problem was in fact the page itself.
Thus one must only guess that it is usually Dreamhost's fault,
for at least not jumbling the evidence recording at the accident scene,
so nobody can figure out what went wrong.
Happens with Mediawiki here on Dreamhost too.
Disabling FastCGI doesn't help either.