Configuration of ALPS touchpad

[Łukasz Maśko]

I'm having problems with my touchpad recently. I have a Dell D430 with Alps 
touchpad. Some time ago I had it configured with synaptics driver and 
everything worked like charm - tapping, scrolling, corners and so on. But 
recently, I don't know since when, I'm having problem. Tapping or touchpad 
corners are not working. Scrolling is working perfectly. I'm also getting 
some strange errors in log (http://yen.ipipan.waw.pl/~ed/Xorg.0.log.gz). My 
touchpad is configured with the following file:

$ cat /etc/X11/xorg.conf.d/50-synaptics.conf
Section "InputClass"
        Identifier "touchpad catchall"
        Driver "synaptics"
        MatchIsTouchpad "on"
        MatchDevicePath "/dev/input/event*"

        Option "SHMConfig" "true"

        Option "LeftEdge" "120"
        Option "RightEdge" "900"
        Option "TopEdge" "120"
        Option "BottomEdge" "660"
        Option "ClickFinger1" "1"
        Option "ClickFinger2" "3"
        Option "ClickFinger3" "2"
        Option "HorizEdgeScroll" "1"
        Option "VertEdgeScroll" "1"
        Option "UpDownScrolling" "1"
        Option "LeftRightScrolling" "1"
        Option "EdgeMotionMinSpeed" "200"
        Option "EdgeMotionMaxSpeed" "200"
        Option "VertTwoFingerScroll" "0"
        Option "HorizTwoFingerScroll" "0"
        Option "HorizScrollDelta" "20"
        Option "VertScrollDelta" "20"
        Option "FingerLow" "18"
        Option "FingerHigh" "19"
        Option "FingerPress" "256"
        Option "PalmDetect" "0"
        Option "PalmMinWidth" "10"
        Option "PalmMinZ" "200"
        Option "MinSpeed" "2"
        Option "MaxSpeed" "2.5"
        Option "AccelFactor" "0.020"
        Option "MaxTapMove" "110"
        Option "MaxTapTime" "180"
        Option "MaxDoubleTapTime" "300"
        Option "EmulateMidButtonTime" "75"
        Option "EmulateTwoFingerMinZ" "100"
        Option "TapButton1" "1"
        Option "TapButton2" "3"
        Option "TapButton3" "0"
        Option "RTCornerButton" "0"
        Option "RBCornerButton" "0"
        Option "LTCornerButton" "0"
        Option "LBCornerButton" "0"
        Option "Emulate3Buttons" "on"
EndSection

What's wrong with my config? Can you help me with this?
-- 
Łukasz Maśko                                           GG:   2441498    _o)
Lukasz.Masko(at)ipipan.waw.pl                                           /\\
Registered Linux User #61028                                           _\_V
Ubuntu: staroafrykańskie słowo oznaczające "Nie umiem zainstalować Debiana"