A few months ago, I bought a MacBook Pro. For the majority of the time since, I’ve not had a single bad thing to say about it. When all of my programs that have a vertical scroll bar (Word, Mail.app, Firefox, Safari, Camino, Final Draft Pro) started to stutter in the manner shown above, my tune changed a bit.
The error only happens when the computer is not plugged into the power adapter, and the workaround is only a single command-click (Command+A) away. Despite the simplicity of this fix, Apple needs to stop the problem where it stands.