Issues checking out code from Google Code
I also had this problem when moving to 11.10 (although with an Assembla SVN repo, not Google code). This solution from Jan Kester's blog worked for me:
sudo apt-get install libneon27
cd /usr/lib/
sudo rm libneon-gnutls.so.27
sudo ln -s /usr/lib/libneon.so.27 libneon-gnutls.so.27
Hope this helps.
it's working fine here with the same svn version as yourself. Can you try backing up/removing/renaming your ~/.ssh and ~/.subversion folders and seeing if that helps matters.
I see that the above solved the same issue for other users on earlier Ubuntu versions.