I just got tired of this and bought a new mouse... The problem just gone away.
But my old mouse, an A4 Tech WOP-35 PS/2, works fine in Windows. So I think this is some kind of incompatibility between my old mouse and Ubuntu 9.04.
I just got tired of this and bought a new mouse... The problem just gone away.
But my old mouse, an A4 Tech WOP-35 PS/2, works fine in Windows. So I think this is some kind of incompatibility between my old mouse and Ubuntu 9.04.