Bugs since last update (Ubuntu 15.04 - oct 6 2015): nautilus crashes

I made the last update as usually, but after the reboot, I noticed a bug.

Nautilus freezes

When I open nautilus, the window just becomes grey and... nothing.

When I call it from terminal, I get this error the first time:

(nautilus:3934): Gtk-CRITICAL **: gtk_icon_theme_get_for_screen: assertion 'GDK_IS_SCREEN (screen)' failed(nautilus:3934): GLib-GObject-WARNING **: invalid (NULL) pointer instance(nautilus:3934): GLib-GObject-CRITICAL **: g_signal_connect_object: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed

and the other times:

** (nautilus:5266): CRITICAL **: nautilus_menu_provider_get_background_items: assertion 'NAUTILUS_IS_MENU_PROVIDER (provider)' failed** (nautilus:5266): CRITICAL **: nautilus_menu_provider_get_background_items: assertion 'NAUTILUS_IS_MENU_PROVIDER (provider)' failed