recent security updates to 10.3-RELEASE broke xdm?

[Anton Shterenlikht]

This is an amd64 laptop.
After updating to:

# /bin/freebsd-version -ku                                                      
10.3-RELEASE-p7                                                                 
10.3-RELEASE-p9   

My xdm doesn't want to login me anymore.
As soon as I enter the passwd, xdm reboots
and presents me with the login prompt again.

I see this in .xsession-errors:

Protocol not supported by server                                                
Couldn't connect to :0                                                          
Protocol not supported by server                                                
mwm: Could not open display.                                                    
Protocol not supported by server                                                
DBUS_SESSION_BUS_ADDRESS='unix:path=/tmp/dbus-dEtC0CeeXH,guid=f1d367e2b8c81e06b0
b3ce7257f0d422';                                                                
export DBUS_SESSION_BUS_ADDRESS;                                                
DBUS_SESSION_BUS_PID=1555;                                                      
D-Bus per-session daemon address is:    

My .xsession script is:

xautolock -locker slock &                                                       
mwm                                                                             

# test for an existing bus daemon, just to be safe                              
if test -z "$DBUS_SESSION_BUS_ADDRESS" ; then                                   
    # if not found, launch a new one                                            
    eval 'dbus-launch --sh-syntax --exit-with-session'                          
    echo "D-Bus per-session daemon address is: $DBUS_SESSION_BUS_ADDRESS"       
fi   

Am I out of date?
Is my .xsession script too old?

Any other advice?

Thanks

Anton