Matthias Clasen gave readers of his blog another one of his release previews this Saturday of the upcoming GNOME 3.5.5. The big feature this release is the “new screen lock implementation.” Beyond that, various applications and System Settings received some improvements as well.
Clasen said the new screen lock mechanism is actually a sheild that lifts when depressing “Esc” or by dragging with the mouse. Underneath is the unlock screen. Clasen said it still has a few issues, but it works well.