There is a problem with the cinnamon's network manager applet, specifically it disappeared from the panel and also from the settings->applets and instead there is the nm-applet in the system tray. It works fine if I revert the update back to 3.4.0

Also experienced the same WLAN issue as @hreindl

cinnamon-screensaver is broken and doesn't work at all. Running the binary returns:

Traceback (most recent call last): File "/usr/share/cinnamon-screensaver/cinnamon-screensaver-main.py", line 13, in < module> import setproctitle ImportError: No module named 'setproctitle'

Downgrading the package didn't work either; the screensaver starts, but after entering any password and submitting, it just shows the loader forever and nothing happens. Had to also downgrade other cinnamon* packages for it work work again.