Since the upgrade of Subversion and mod_dav_svn to version 1.8.x, each attempt to checkout from a SVN repository handled by the SVN plugin makes the following warning message appear several times in /var/log/httpd/error_log:
[warn] mod_dav_svn: nested Location '/svnroot/TestProject/TestRepo' hinders access to 'TestRepo' in SVNPath Location '/svnroot/TestProject'
This is a warning message only: users are able to checkout, but this warning message did not appear with Subversion and mod_dav_svn 1.6.11.
This only affects users of the multi-repo SVN plugin. The operation of the core SVN is not affected at all.