Another, third, computer with Kubuntu have this problem configurations are:
1. x86_64 9.04 Ubuntu on AMD with Creative USB mouse
2. x86 8.04 Ubuntu on Intel with Logitech PS/2 mouse with PS/2 <-> USB cable
3. x86_64 9.04 Kubuntu on AMD (fresh install) Toshiba Laptop with unknown OEM mouse on USB and Trackpad
Another, third, computer with Kubuntu have this problem configurations are:
1. x86_64 9.04 Ubuntu on AMD with Creative USB mouse
2. x86 8.04 Ubuntu on Intel with Logitech PS/2 mouse with PS/2 <-> USB cable
3. x86_64 9.04 Kubuntu on AMD (fresh install) Toshiba Laptop with unknown OEM mouse on USB and Trackpad
it drive me crazy! ;)