scm:checkin uses <connection> not <developerConnection>

Looks like scm:checkin uses <connection> and not <developerConnection>. http://maven.apache.org/ref/2.0.3-SNAPSHOT/maven-model/maven.html#class_scm states that <connection> is to be read-only.

Below found case for a <connection> read-only that fails:
...
[DEBUG] Retrieving parent-POM: org.apache.maven.scm:maven-scm::1.0-beta-2 for project: null:maven-scm-providers:pom:1.0-beta-2 from the repository.
[DEBUG] org.apache.maven.scm:maven-scm-provider-svn:jar:1.0-beta-2:runtime (selected for runtime)
[DEBUG] Configuring mojo 'org.apache.maven.plugins:maven-scm-plugin:1.0-beta-2:checkin' -->
[DEBUG] (f) basedir = /export1/eae/am74839/esfSample
[DEBUG] (f) connectionUrl = scm:cvs:pserver:anonymous@gcatfs1d.ny.ssmb.com:/export1/cvsrep/eae:esfSample
[DEBUG] (f) message = -Fixed problems caused by change in CVS location
[DEBUG] (f) settings = org.apache.maven.settings.Settings@1f3ce5c
[DEBUG] – end configuration --
[INFO] [scm:checkin]
[DEBUG] cvsRoot: :pserver:anonymous@gcatfs1d.ny.ssmb.com:2401/export1/cvsrep/eae
[DEBUG] passFile: /home/am74839/.cvspass
[DEBUG] cvsroot :pserver:anonymous@gcatfs1d.ny.ssmb.com:2401/export1/cvsrep/eae already exist in
/home/am74839/.cvspass. SKIPPED.
[DEBUG] Working directory: /export1/eae/am74839/esfSample
[DEBUG] Command line: cvs -f -d :pserver:anonymous@gcatfs1d.ny.ssmb.com:/export1/cvsrep/eae -q commit -R -F /var/tmp/scm-commit-message55027.txt
[ERROR] Provider message:
[ERROR] The cvs command failed.
[ERROR] Command output:
[ERROR] cvs [server aborted]: "commit" requires write access to the repository
...

Relevant part of POM:
...
<scm>
<connection>scm:cvs:pserver:anonymous@gcatfs1d.ny.ssmb.com:/export1/cvsrep/eae:esfSample</connection>
<developerConnection>scm:cvs:pserver:${user.name}@gcatfs1d.ny.ssmb.com:/export1/cvsrep/eae:esfSample</developerConnection>
</scm>
...