yesterday, svn (non anonymous) was working fine (check out or commit or upgrade). I upgraded one hour later yesterday and since, it does not work anymore. I didn't change anything, that is : i committed, then upgraded the distro, then try to update the svn repo but it failed. The error:

Agent admitted failure to sign using the key.
Permission denied (publickey).
svn: Network connection closed unexpectedly
Does someone see what went wrong ?

thank you