The GNOME Project unleashed a few minutes ago, June 6th, the immediate availability for download and testing of the second development release of the upcoming GNOME 3.6 desktop environment.
GNOME 3.5.2 is a development release that updates the following packages: Nautilus, GNOME Shell, GNOME Terminal, Vino, gvfs, GNOME Contacts, GNOME Online Accounts, Empathy, Evince, GNOME Screenshot, GNOME Panel, and much more.
GNOME 3.5.2 is part of the new GNOME 3.6 desktop upgrade, which should be released on late September 2012. The next development release towards GNOME 3.6 will be GNOME 3.5.3 available this month, on June 27th, 2012.
Download GNOME 3.5.2 right now from Softpedia. Remember that this is a development release and it should NOT be installed on production machines. It is intended to be used for testing purposes only.