Many moons ago I had a dual Pentium Pro and had installed Slackware with one of the early linux kernels to include SMP. And, when clicking on a link in mozilla (or it might have been netscape back then), the new website would only be rendered after I jiggled the mouse. I just figured it was some race condition with the SMP kernel that got broken when the PS2 interrupt fired. It went away with some kernel upgrade, but I still jiggle the mouse every now and then in the hopes a page will render faster...