strangeness in speed of touchpad - 11.3

My touchpad has a great speed/acceleration on the Horizontal axis, but a quite slow one on the Vertical access. I went to Settings (KDE4) and made everything default. The logged out/in. Same problem.

What can I do? I did a kernel upgrade yesterday, is that related?

uname -a
inux #1 SMP PREEMPT 2010-10-07 19:07:51 +0200 x86_64 x86_64 x86_64 GNU/Linux

opensuse 11.3, kde4.

thank you