Align center middle not working correctly with scrollbars

[darrenburns]

With the CSS below on the uber.py example, the content gets pushed behind the scrollbar. There is an unexpected space on the left hand side.

#uber1 {
  layout: vertical;

  background: dark_green;
  overflow: hidden auto;
  border: heavy white;
}

.list-item {
  height: 8;
  align: center middle;
  background: dark_blue;
}