"svn up" over ssh does not work

[Thomas Koenig]

Hi,

I am getting
$ LANG=C svn up
Updating '.':
svn: E170013: Unable to connect to a repository at URL 
'svn+ssh://tkoe...@gcc.gnu.org/svn/gcc/trunk'
svn: E210002: To better debug SSH connection problems, remove the -q 
option from 'ssh' in the [tunnels] section of your Subversion 
configuration file.
svn: E210002: Network connection closed unexpectedly

read-only svn (without ssh) works.

Anything wrong with the servers?

Regards

        Thomas