Like many on the forum, I haven't been able to use my laptop's touchpad for scrolling in Logos 4. I just updated the driver and now it's working beautifully. I have a Dell Studio XPS with Windows 7 64-bit, so I went to Dell's "drivers and downloads" site (where you go will depend on your laptop manufacturer, etc. - obviously).
The updated driver info is as follows:
Synaptics Driver
Version: 15.0.18
Date: 6/16/10 (this was the date listed on download site, but once installed the date read 4/22/10 - either way, it's newer than 2009)
Happy Scrolling!