This post was made with another stylesheet and it might be messed up!
Gnome Shell 3.5.5 released a few hours after Mutter as usual, and the biggest change since 3.5.4 was the introduction of the shell shield, the lock screen.
Unfortunately I couldn’t tried it as I was getting an error when I was click on lock, so for now I’ll just list the changelog (what a shame of me!).

Some GS 3.5.5 errors plus the Rhythmbox that I accidentally opened.
Gnome Shell 3.5.5 Changelog
- +* Update style to match mockups [Allan]
- + – improve calendar layout and legibility
- + – update notifications and menus
- + – use a common style for entries
- + – update scrollbars to match GTK+
- + – improve clock/unlock button in lock screen
- + – update polkit dialogs [Jasper]
- +* Fix login dialog growing when selecting different users [Florian; #675076]
- +* Implement screen lock in the shell [Giovanni]
- + – restructure login code to be shared with session unlock [#619955]
- + – add initial screen shield / unlock dialog implementation [#619955]
- + – implement (optional) notification list on lock shield [#619955]
- + – update login dialog style to match lock screen [#619955]
- + – filter notifications to only show new ones on the screen lock [#681143]
- + – make notifications scrollable if necessary [#681143]
- + – use correct application names in notifications [#681143]
- + – allow to return to the shield by pressing Escape [#681143]
- +* Minor login dialog improvements [Florian]
- + – update style to match the overall visuals [#660913]
- + – indicate whether users are logged in [#658185]
- +* Add support for background-repeat CSS property [Jasper; #680801]
- +* Add :active pseudo class on scroll handles [Florian]
- +* Remove markup from translated strings [Matthias; #681270]
- +* Misc bug fixes and cleanups: [Alban, Florian, Giovanni, Jasper, Jeremy, Matthias, Piotr; #677893, #679944, #680064, #680170, #680216, #680426, #681101, #681382]
Contributors
- Jeremy Bicha
- Alban Browaeys
- Giovanni Campagna
- Matthias Clasen
- Allan Day
- Piotr Drąg
- Florian Müllner
- Jasper St. Pierre
Translations
- Matej Urbančič [sl]
- Tom Tryfonidis [el]
- Yaron Shahrabani [he]
- Kjartan Maraas [nb]
- Baurzhan Muftakhidinov [kk]
- Praveen Illa [te]
- Khaled Hosny [ar]
- Daniel Mustieles [es]
- Gabor Kelemen [hu]
- Fran Diéguez [gl]
- Sweta Kothari [gu]
- Aleksej Kabanov [ru]
- Nilamdyuti Goswami [as]
- Arash Mousavi [fa]
- Мирослав Николић [sr, sr@latin]
