Natty beta 2 mouse jumpy

When I press and hold my finger on the touch pad, the cursor jiggles. I tried adjusting the various sensitivity and acceleration options, but it did not change. For general use, it is not an issue, however, it makes FPS impossible to play. I connected a USB mouse, and will sometimes get the same thing. It's possible there are two issues here. The game I tried is AlepOne. I found the USB mouse to exhibit the strange wiggly behavior but could correct it be restarting the game. The touchpad always jiggles erratically, in Unity, the game, etc.

Also, is there a way to adjust the speed of the two-finger scroll (slow it down)?

Currently using 11.04 B2, current as of 4/20/2011. Hardware is x120e.