New subversion repository format?

HI! I don't know if this is the correct list to post this to.
I was using subversion rev 2706 (from a debian package). I upgraded to
rev 3210 (latest debian package) and now my old repositories doesn't
work. I get this error:
$ svn ci
svn: Error del determinador de nombres desconocido
svn: Commit failed (details follow):
svn: Unable to open an ra_local session to URL
svn: svn_ra_local__split_URL: Unable to find valid repository
   (file:///var/lib/subversion/he/tronco/src/includes/hooks)

doing a svnlook /var/lib/subversion/he I get this:
svn: Unknown resolver error
svn: Expected version '1' of repository; found no version at all; is
`/var/lib/subversion/he' a valid repository path?
svn: No such file or directory
svn: svn_io_file_open: can't open `/var/lib/subversion/he/format'

Of course I don't have this 'format' file... I've created a new test
repository and the 'format' file with '1' in the contents is there and
works just fine. I don't know why I'm telling this to you since I'm sure
you know it better than me :)
I tried to make a backup and add the file 'format' but I get this error:
$ svn co file:///home/luca/temp/he_root he_prueba
A he_prueba/tronco
svn: Error del determinador de nombres desconocido
svn: reference to non-existent node `2.1.30' in filesystem
`/home/luca/temp/he_root/db'

So, finally, my question is... Is the format changed or am I dreaming (a
nightmare :( )??? And the most important: is there a way to "import" the
old repository in the new format???

Thanks...

(please Cc me :)

-- 
Leandro Lucarella @ MEcon                       .-----------------------------.
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