Here is the information that I received after trying to get a brand  new checkout of the source code.  I am running fully updated Fedora 9 with the current subversion as well.....

[Frog@FrogMan ~]$ su -l
Password:
su: incorrect password
[Frog@FrogMan ~]$ svn co https://gramps.svn.sourceforge.net/svnroot/gramps/trunk gramps-trunk

svn: This client is too old to work with working copy 'gramps-trunk'; please get a newer Subversion client
[Frog@FrogMan ~]$
[Frog@FrogMan ~]$ rpm -qa subversion*
subversion-javahl-1.4.6-7.i386
subversion-api-docs-1.4.6-1.fc9.noarch
subversion-perl-1.4.6-7.i386
subversion-devel-1.4.6-7.i386
subversion-1.4.6-7.i386
subversion-ruby-1.4.6-7.i386
[Frog@FrogMan ~]$



Sincerely,
Rob