tap-drag on laptop touchpad no longer works in 2.6.15 and 2.6.13

[Scott A Crosby <scrosby@cs.rice.edu>]

I'm not sure if it was a planned change, but the default behavior for
my touchpad has changed --- I can no longer tap-drag.

It works fine in 2.6.10 and no longer works on 2.6.13 or 2.6.15 on my
Dell Inspiron 8200.

The device is recognized (by 2.6.15) as:

I: Bus=0011 Vendor=0002 Product=0008 Version=0000
N: Name="DualPoint Stick"
P: Phys=isa0060/serio1/input1
S: Sysfs=/class/input/input1
H: Handlers=mouse0 event1 
B: EV=7
B: KEY=70000 0 0 0 0 0 0 0 0
B: REL=3

I: Bus=0011 Vendor=0002 Product=0008 Version=2222
N: Name="AlpsPS/2 ALPS DualPoint TouchPad"
P: Phys=isa0060/serio1/input0
S: Sysfs=/class/input/input2
H: Handlers=mouse1 event2 
B: EV=f
B: KEY=420 0 70000 0 0 0 0 0 0 0 0
B: REL=3
B: ABS=1000003


xorg.conf:

Section "InputDevice"
        Identifier      "Configured Mouse"
        Driver          "mouse"
        Option          "SendCoreEvents"        "true"
        Option          "Device"                "/dev/input/mice"
        Option          "Protocol"              "Auto"
        Option          "Emulate3Buttons"       "true"
        Option          "ZAxisMapping"          "4 5"
EndSection


Thanks,
Scott