Very weird bug

[Aritz]

Today I played and I realised that my KS1 has again its RPM limiter... I couldn't believe what was happening and I did a new clean installation. After that, the RPM limiter was off again and my engine blowed up when I pushed the throttle to the metal.
Other usual problems when you have a not clean installation like bad setup and uncontrollable kart or missing textures or whatever, were not. So the only changes were the limiter and the problem for other people to enter on my server. After the clean installation, people can enter on my server.

Of course I did not do any change on the game and the only new stuff on my computer is the Internet Explorer 9 (IE 8 before). Could be IE the problem?