failed port upgrade to subversion-1.2.3_1

[cerion]

Hi,
I'm following RELENG_4, and have successfully used portupgrade with all my 
ports bar subversion...

I make subversion with 
-DWITH_MOD_DAV_SVN -DWITH_SVNSERVE_WRAPPER SVNGROUP=svn
and the MOD_DAV flag enables WITH_APACHE2_APR
 - this completes without complaint.

but when i try make install, i get:
...
===>   subversion-1.2.3_1 depends on shared library: apr-1.0 - not found
===>    Verifying install for apr-1.0 in /usr/ports/devel/apr-svn
===>  Vulnerability check disabled, database not found
===>  Extracting for apr-nothr-db4-1.2.2_1
=> Checksum OK for apr-1.2.2.tar.gz.
...
(happily goes off and builds apr-1.2.2)
...
===>   Returning to build of subversion-1.2.3_1
Error: shared library "apr-1.0" does not exist
*** Error code 1

Argh!

/usr/local/lib/apache2 has:
libapr-0.a
libapr-0.so@ -> libapr-0.so.9
libapr-0.so.9*

/usr/local/lib has:
libapr-1.a
libapr-1.so@ -> libapr-1.so.2
libapr-1.so.2*

I see in the Makefile that it's the bdb requiring apr1.0:
.if !defined(WITHOUT_BDB)
LIB_DEPENDS+=   apr-1.0:${PORTSDIR}/devel/apr-svn
APR_PORT=       devel/apr-svn

But I don't know if I'm doing something wrong, or if this is a mistake in the 
port files...

Any suggestions most welcome!
Cerion