smtpd_proxy, amavisd-new, and logging problems

I've been using postfix with amavisd-new for a little over a week now,
and I've been very happy with it over my old qmail install (I finally
gave up on the "accept-then-bounce" behavior, among other things).

The one thing that's bugging me is that when I used amavisd-new as a
content filter, I got normally-formatted log lines like:

May 5 23:37:45 delta postfix/smtp[4925]: 8D3592D8078: to=<DELETED>,
relay=127.0.0.1[127.0.0.1], delay=5, status=bounced (host
127.0.0.1[127.0.0.1] said: 550 5.7.1 Message content rejected,
id=04867-02 - VIRUS: Eicar-Test-Signature, Eicar-Test-Signature (in
reply to end of DATA command))

pflogsumm liked those.

Since I switched amavisd-new over to the smtpd_proxy setup, I get no
such logging unless I invoke smtpd -v via master.cf - and then the
formatting is different:

May 10 20:45:16 delta postfix/smtpd[10330]: > 127.0.0.1[127.0.0.1]: 550
5.7.1 Message content rejected, id=10122-06 - VIRUS:
Eicar-Test-Signature, Eicar-Test-Signature

From what I can see, the amavisd-new response hasn't changed one whit -
it's the postfix behavior to that response that has changed as a result
of my changing the configuration to smtpd_proxy.

What's the easiest method to log the info I need without using smtpd -v
(that's a whole LOT of info I *don't* need at this time - things are
working about the way I'd like *except* for logging the
rejections/reasons!)?

--
spam delenda est