Another annoying aspect of this jumping, when logging in, it often jumps my curser back to the log in name, resulting in me typing my password into my username. Not always, but but I immediately starting type my password, it usually jumps. If I wait, it doesn't
To avoid that, try double clicking on the "log in" in the Moparts header, it should log you in without having to type out your log in name and password.....this works for me
