I have Ubuntu Linux 10.4 installed on my notebook computer named Lenny. I have the same system installed on my desktop computer named Athol (I had a lot of trouble getting that hardware to work). I have installed the Ubuntu Subversion packages on each; namely
        subversion
        libapache2-svn
        libgirepository-1.0-1
In both cases the SVNParentPath is /data/svn and that directory is owned by www-data:
    drwxr-xr-x 5 www-data www-data 4096 2011-07-22 09:16 /data/svn

Here is the critical command:
    sudo -u www-data svnadmin create /data/svn/boofar
On Lenny the command works, silently. On Athol I get this message:
   svnadmin: error while loading shared libraries: libsvn_repos-1.so.0:
         cannot open shared object file: No such file or directory

Apparently svnadmin cannot find something, but I don't know what it can't find. In both cases /usr/lib/libsvn_repos-1.so.1 is a symoblic link to:
    -rw-r--r-- 1 root root 153700 2011-06-05 22:48 /usr/lib/libsvn_repos-1.so.1.0.0

I Googled for that error message and somebody had a problem with the home directory locations. The implication was that for some reason a Subversion distribution hard-codes the name of the home directory parent path (e.g. "/home"). No problem with my home directories; the arrangement is identical. On both machines my home directory is /data/andy and /home/andy is a symbolic link to /data/andy.

So any idea why svnadmin runs OK on one machine and fails on the other?