Gnome-screensaver does not unlock computer on Saucy

[Norbert]

I have Ubuntu 13.10 with all updates (normal and -proposed).
I have two keyboard layouts - Russian and English.
Before screen locking (with Ctrl+Alt+L) I have English layout.

After activating gnome-screensaver I can't unlock my laptop. Gnome-screensaver is running, showed me my username and text field for password (there is "En" in right of it - so English layout is selected), I enter my password (without errors with Caps Lock off), but gnome-screensaver does not unlock screen and asks me for enter password again.

It seems that gnome-screensaver can't unlock my system.
I can get access to desktop only from another terminal (Ctrl+Alt+F1) by restaring XServer with "sudo service lightdm restart".

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: gnome-screensaver 3.6.1-0ubuntu7
ProcVersionSignature: Ubuntu 3.11.0-15.22-generic 3.11.10
Uname: Linux 3.11.0-15-generic i686
NonfreeKernelModules: nvidia
ApportVersion: 2.12.5-0ubuntu2.1
Architecture: i386
Date: Sat Dec 7 14:40:34 2013
GnomeSessionIdleInhibited: No
GnomeSessionInhibitors: None
GsettingsGnomeSession:
 org.gnome.desktop.session idle-delay uint32 300
 org.gnome.desktop.session session-name 'ubuntu'
InstallationDate: Installed on 2013-10-20 (47 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release i386 (20131016.1)
MarkForUpload: True
SourcePackage: gnome-screensaver
UpgradeStatus: No upgrade log present (probably fresh install)

[Norbert (nrbrtx)]

In /etc/default/keyboard I have:

XKBMODEL="pc105"
XKBLAYOUT="us,ru"
XKBVARIANT=","
XKBOPTIONS=""

[Norbert (nrbrtx)]

For keyboard layout switching I use Alt+Shift.
All packages are from official Ubuntu repositories. I have only one PPA - ppa:freefilesync/ffs - for FreeFileSync (it does not contain system packages).