I have just downloaded Eclipse Helios. I can't tell the difference with Galileo for the moment, I will have to check out the release notice. However when updating GWT I got the following exception. Very interesting. As I was upgrading it seems my eclipse.ini, which I'd copied from elsewhere, had picked up my Socks proxy browser settings.
org.eclipse.equinox.p2.core.ProvisionException: Unable to read repository at http://dl.google.com/eclipse/plugin/3.6/content.xml. at org.eclipse.equinox.internal.p2.repository.CacheManager.createCache(CacheManager.java:189) ... Caused by: java.net.SocketException: Can't connect to SOCKS proxy:Connection refused: connect at java.net.SocksSocketImpl.connect(Unknown Source) ... 1 more
To fix this look in the Eclipse menus and go to:
Windows → Preferences → General → Network Connections
Remove the Socks proxy and configure your network connections to suit your client.