Somehow, at some point, I installed this version of the Eclipse Glassfish Plugin for Juno:
Oracle GlassFish Server Tools 2.0.1.201207240829
I'm trying to help a co-worker install it too. But the latest version from the marketplace is
Oracle GlassFish Server Tools 2.0.1.201201241920
I think I must have gotten it from here which is referenced in this accepted anser but that site is now dead. That site is also referenced in this question
Does anyone know what the heck is going on with Eclipse Glassfish Plugin for Juno and Glassfish 3.1.2.2, and/or a different place from where we can get the version I seem to have?
Or else, tell me where I can report this problem to the team that maintains this plugin other than SO?
Oracle is currently migrating the GlassFish plugins - see https://blogs.oracle.com/piotrik/entry/migration_of_eclipse_plugins_java for details.
The old update site http://dlc.sun.com.edgesuite.net/glassfish/eclipse/juno/ is working again (despite appearing empty when you open the URL in your web browser).