Help with Apache SVN setup

Hi there:

I've setup a new repository with apache svn and everything works fine except
commiting new files. Those which already exist behave well.

My repositories are in a machine with Ubuntu 9.10 Server and the path for
the repos is /var/subversion. All the repos are inside it.

Here's the vhost for apache:

<IfModule mod_ssl.c>
<VirtualHost 82.223.117.122:443>
  ServerName svn.iosistemas.com

 <Location />
  DAV svn
  SVNParentPath /var/subversion/
  AuthType Basic
  AuthName "IO Sistemas SVN"
  AuthUserFile /etc/subversion/passwd
  Require valid-user
 </Location>

    SSLEngine on
    SSLCertificateFile /etc/ssl/certs/server.crt
    SSLCertificateKeyFile /etc/ssl/private/server.key

</VirtualHost>
</IfModule>

It's responding correctly, allows checkout of previously existing projects
(copied from another machine), asking for authentication, etc. Permissions
in those folders are setup for user www-data, the user under apache is
running.

When I add a new file to any repository I get this on the client side:

macbook:pruebas widemos$ svn commit

Mensaje de log sin cambios o no especificado
(a)bortar, (c)ontinuar, (e)ditar:
c
Añadiendo pendientes.txt
svn: Falló el commit (detalles a continuación):
svn: Could not open the requested SVN filesystem
svn: Could not open the requested SVN filesystem

And in the server's log:

svn.iosistemas.com:443 85.87.32.155 - - [28/Mar/2010:23:22:55 +0200]
"OPTIONS /pruebas HTTP/1.1" 401 2089 "-" "SVN/1.6.9 (r901367) neon/0.29.3"
svn.iosistemas.com:443 85.87.32.155 - widemos [28/Mar/2010:23:22:55 +0200]
"OPTIONS /pruebas HTTP/1.1" 200 980 "-" "SVN/1.6.9 (r901367) neon/0.29.3"
svn.iosistemas.com:443 85.87.32.155 - widemos [28/Mar/2010:23:22:55 +0200]
"PROPFIND /pruebas HTTP/1.1" 207 660 "-" "SVN/1.6.9 (r901367) neon/0.29.3"
svn.iosistemas.com:443 85.87.32.155 - widemos [28/Mar/2010:23:22:56 +0200]
"MKACTIVITY /pruebas/!svn/act/77ff8fe7-26e8-4a28-a329-daf1394a3d81 HTTP/1.1"
201 628 "-" "SVN/1.6.9 (r901367) neon/0.29.3"
svn.iosistemas.com:443 85.87.32.155 - widemos [28/Mar/2010:23:22:56 +0200]
"CHECKOUT /pruebas/!svn/vcc/default HTTP/1.1" 201 644 "-" "SVN/1.6.9
(r901367) neon/0.29.3"
svn.iosistemas.com:443 85.87.32.155 - widemos [28/Mar/2010:23:22:56 +0200]
"PROPPATCH /pruebas/!svn/wbl/77ff8fe7-26e8-4a28-a329-daf1394a3d81/0
HTTP/1.1" 207 580 "-" "SVN/1.6.9 (r901367) neon/0.29.3"
svn.iosistemas.com:443 85.87.32.155 - widemos [28/Mar/2010:23:22:56 +0200]
"PROPFIND /pruebas HTTP/1.1" 207 548 "-" "SVN/1.6.9 (r901367) neon/0.29.3"
svn.iosistemas.com:443 85.87.32.155 - widemos [28/Mar/2010:23:22:56 +0200]
"CHECKOUT /pruebas/!svn/ver/0/ HTTP/1.1" 201 644 "-" "SVN/1.6.9 (r901367)
neon/0.29.3"
svn.iosistemas.com:443 85.87.32.155 - widemos [28/Mar/2010:23:22:56 +0200]
"PROPFIND
/pruebas/!svn/wrk/77ff8fe7-26e8-4a28-a329-daf1394a3d81/pendientes.txt
HTTP/1.1" 500 516 "-" "SVN/1.6.9 (r901367) neon/0.29.3"
svn.iosistemas.com:443 85.87.32.155 - widemos [28/Mar/2010:23:22:56 +0200]
"PROPFIND /pruebas/pendientes.txt HTTP/1.1" 500 2030 "-" "SVN/1.6.9
(r901367) neon/0.29.3"
svn.iosistemas.com:443 85.87.32.155 - widemos [28/Mar/2010:23:22:56 +0200]
"DELETE /pruebas/!svn/act/77ff8fe7-26e8-4a28-a329-daf1394a3d81 HTTP/1.1" 204
287 "-" "SVN/1.6.9 (r901367) neon/0.29.3"

And this, also in the server:

[Sun Mar 28 23:22:56 2010] [error] [client 85.87.32.155] (20014)Internal
error: Can't open file '/var/subversion/error/format': No such file or
directory
[Sun Mar 28 23:22:56 2010] [error] [client 85.87.32.155] Could not fetch
resource information. [500, #0]
[Sun Mar 28 23:22:56 2010] [error] [client 85.87.32.155] Could not open the
requested SVN filesystem [500, #2]
[Sun Mar 28 23:22:56 2010] [error] [client 85.87.32.155] Could not open the
requested SVN filesystem [500, #2]

Any help will be appreciated, I'm stuck.

Bye.

-- 
---------------------------------------------------
Ion Jaureguialzo Sarasola
Vitoria-Gasteiz
Spain