This release was anticipated a bit because of a critical fix to the debugger, which was not working in python 3 (the thread module was renamed to _thread and this wasn't properly dealt with).
Also noteworthy in Pydev 1.6.1:
There are actions to restart the last launch (Ctrl+Shift+F9 in pydev editor) and terminate all launches (Ctrl+Alt+F9 in pydev editor). Buttons were also added in the console output view of pydev launches to activate those (so, it's now easier to restart a given launch after code-changes).
2to3 is now integrated in pydev. To use it right click a folder or file and choose the menu "Pydev > Apply 2 to 3".