Graceful restart request to Apache2 leading to seg fault

[Graeme]

I've seen something similar in the list archives from 2003, but it seems
to be back (for me at least).

I'm running FreeBSD 5.3 with:
       Apache/2.0.54 (FreeBSD) PHP/4.4.0 mod_ssl/2.0.54 OpenSSL/0.9.7g

and on stopping Apache with SIGTERM I get:
       httpd in free(): error: junk pointer, too high to make sense

in the error log.

Anyone else seeing this?  All advice gratefully received.

Cheers
Graeme