I'm dualbooting Ubuntu and Win7 (though I must admit I can count the number of times I've used Win7 during the last 6 months on one hand). 

My laptop is a Acer TravelMate 8471.

One thing I noticed after the last time I rebooted in to Ubuntu were that my touchpad were acting a bit weird. Usually I scroll with two fingers (same on Win7), but suddenly my mouse would just jump around and send a lot of weird keypresses at the same time, when I tried to scroll. I tried having a look at the settings in the synclient, but everything seemed to be the same. I turned the touchpad off and then on, tried messing around with a lot of settings, but nothing seemed to help the two-finger scroll problem.

Then I rebooted my computer, but the problem was still there. At last I turned the computer off, waited 5 seconds and turned it on again. And all of a sudden my touchpad worked just as good as before.

This is happening every time I reboot from Win7, in to Ubuntu, and the only thing that fixes it, is to turn off the laptop, and then turn it on again (no waiting required).

My guess is that the Synaptics driver on Win7 does something to the touchpad, that is not reset before a complete power off.

Have anyone gotten any suggestions?