FC6: kernel upgrade breaks Synaptic Touchpad support

On my 3-year-old HP Pavilion zv5000z notebook, running Fedora Core 6 for 
x86_64, I just applied all the available updates.

Now, when it tries to go into X, it balks.  The problem is that the
mouse (a Synaptics touch pad) is no longer found.

If I boot with kernel 2.6.22.7-57.fc6, I get this problem.
If I boot with the previous kernels 2.6.20-1.2962.fc6 or
2.6.20-1.3002.fc6xen, I have no problem.

So something has changed in the kernel.

dmesg in both cases makes no mention of the Synaptics device, at least
under that name.

Here is a portion of a diff of the Xorg.0.logs of a working and a
failing run:

    @@ -769,8 +769,8 @@
     (**) Option "CustomKeycodes" "off"
     (**) Keyboard0: CustomKeycodes disabled
     (II) Synaptics touchpad driver version 0.14.4 (1404)
    -(--) Synaptics auto-dev sets device to /dev/input/event2
    -(**) Option "Device" "/dev/input/event2"
    +Synaptics no synaptics event device found (checked 16 nodes)
    +(**) Option "Device" "/dev/input/mice"
     (**) Option "LeftEdge" "120"
     (**) Option "RightEdge" "830"
     (**) Option "TopEdge" "120"
    @@ -780,9 +780,11 @@
     (**) Option "MaxTapMove" "110"
     (**) Option "VertScrollDelta" "20"
     (**) Option "HorizScrollDelta" "20"
    -(--) Synaptics touchpad found
    -(**) Option "CorePointer"
    -(**) Synaptics: Core Pointer
    +Query no Synaptics: 6003C8
    +(EE) Synaptics no synaptics touchpad detected and no repeater device
    +(EE) Synaptics Unable to query/initialize Synaptics hardware.
    +(EE) PreInit failed for input device "Synaptics"
    +(II) UnloadModule: "synaptics"
     (**) Option "Protocol" "IMPS/2"
     (**) Mouse0: Device: "/dev/input/mice"
     (**) Mouse0: Protocol: "IMPS/2"

In both dmesg ouputs, I see:
  mice: PS/2 mouse device common for all mice
and
  input: AlpsPS/2 ALPS GlidePoint as /class/input/input2

Here is the section of my xorg.conf dealing with the touchpad:
Section "InputDevice"
        Identifier  "Synaptics"
        Driver      "synaptics"
        Option      "Device" "/dev/input/mice"
        Option      "Protocol" "auto-dev"
        Option      "Emulate3Buttons" "yes"
        Option      "LeftEdge" "120"
        Option      "RightEdge" "830"
        Option      "TopEdge" "120"
        Option      "BottomEdge" "650"
        Option      "FingerLow" "14"
        Option      "FingerHigh" "15"
        Option      "MaxTapMove" "110"
        Option      "VertScrollDelta" "20"
        Option      "HorizScrollDelta" "20"
        Option      "MinSpeed" "0.3"
        Option      "MaxSpeed" "0.75"
EndSection


I didn't find anything relevant in bugzilla.

(I would like to run the new kernel -- it might let me use my stupid
Broadcom wireless interface.  It is inconvenient that the new and old
kernels require different Broadcom firmware.)

Any ideas?