In both the chat window and the roster window, the scrollbar doesn’t seem to follow typical UI behavior. If you click on the additional space on the scrollbar either above or below the position indicator (sorry I’m not sure what else to call that part of the scrollbar), it only moves a few lines. In most windows applications, clicking that space acts as a page down or page up.
Some of our users are missing the ability to page up/down in Spark windows and would prefer to be able to do this by clicking on the blank part of the scrollbar as they can in other applications.
Thanks for considering this.