A better question to ask might be how to fix the problem, especially if the touchpad issue is a regression from previous versions. And the Ubuntu bugtracker is the best place to start. For example, Bug 859474 suggests some workarounds for touchpad dragging issues, and the commenters there mention that the problem was fixed in 12.04. Bug 868400 is another touchpad problem that showed up in 11.10; some workarounds are shown and it looks like it was recently fixed in an upgraded
The same bugtracker is the place to report problems like this. Be sure to include all relevant info (the exact problem, your computer's model, etc) for the best chance of finding a solution.