Latitude E4310 top mouse button click speed

I have a Latitude E4310 running OpenSuSE 11.3. The laptop has a touchpad as well as a nub in the keyboard. it has 2 sets of mouse buttons, one below the touchpad for use with that, and one set above the touchpad for use with the nub

when i left click on the top set, the repetition is so quick that i can barely manage to click on anything without having it perform a double click.

using the bottom buttons the left mouse click is normal

i tried setting the mouse dupble click delay in control panel but it seemed to have no effect.

can someone tell me where/how this is controlled?