Mine does this if I release the clutch too quickly without enough gas. But if I concentrate on a slower smooth release it's fine. Feels like it gives it a burst of power if the clutch is lifted too quick. Seem to have gotten used to being a bit smoother when driving normally, and to be honest it kind of helps when accelerating quickly. Like I said only seems to do it if I'm being a bit aggressive with the clutch release.
Edit: And also the downshifting jerk only happens if you keep your foot on the clutch too long when changing down, as it stops the rev-matching from happening automatically. So the revs will begin to fall and will jerk if you're going too fast when downshifting between 3rd and 2nd.
Edit: And also the downshifting jerk only happens if you keep your foot on the clutch too long when changing down, as it stops the rev-matching from happening automatically. So the revs will begin to fall and will jerk if you're going too fast when downshifting between 3rd and 2nd.