405 Method Not Allowed in response to Options

I have been having problems updating and installing new software in Eclipse, and the problem appears to be related to svn. It seems that I can duplicate the problems using svn info as shown in text below. I am running the latest version of Snow Leopard on a MacBook Pro. I received the 405 error with another site, but it went away when I used a mirror. Note that the redirected site for polarion.com appears to be the same one I had just entered. I have seen other entries on Google mentioning the 405 error. As it is, I can't update Google Web Tools.

BradleyRossMacBook:~ bradleyross$ svn --version
svn, version 1.6.16 (r1073529)
   compiled Mar 10 2011, 10:18:52

Copyright (C) 2000-2009 CollabNet.
Subversion is open source software, see http://subversion.apache.org/
This product includes software developed by CollabNet (http://www.Collab.Net/).

The following repository access (RA) modules are available:

* ra_neon : Module for accessing a repository via WebDAV protocol using Neon.
  - handles 'http' scheme
  - handles 'https' scheme
* ra_svn : Module for accessing a repository using the svn network protocol.
  - with Cyrus SASL authentication
  - handles 'svn' scheme
* ra_local : Module for accessing a repository on local disk.
  - handles 'file' scheme
* ra_serf : Module for accessing a repository via WebDAV protocol using serf.
  - handles 'http' scheme
  - handles 'https' scheme

BradleyRossMacBook:~ bradleyross$ svn info http://dl.google.com
svn: Server sent unexpected return value (405 Method Not Allowed) in response to OPTIONS request for 'http://dl.google.com'
BradleyRossMacBook:~ bradleyross$ svn info http://community.polarion.com/projec
ts/subversive/download/eclipse/2.0/helios-site/
svn: Repository moved permanently to 'http://community.polarion.com/projects/subversive/download/eclipse/2.0/helios-site/'; please relocate
BradleyRossMacBook:~ bradleyross$ svn info http://dl.google.com/eclipse/plugin/
3.6
svn: Server sent unexpected return value (405 Method Not Allowed) in response to OPTIONS request for 'http://dl.google.com/eclipse/plugin/3.6'
BradleyRossMacBook:~ bradleyross$
Received on 2011-04-27 07:56:25 CEST