As can be seen here:
primefaces scrolling DataTable
And in the image:

When using a vertical scrollbar only, the scrollbar is too far right of the table. This is more obviously displeasing when using dark colored themes.
How do you bring the scrollbar to be flush with the table?
I’m using Primefaces 3.0.1, and the showcase uses the latest snapshot.
This is not a bug, just increase your column widths or set a fixed scrollWidth, showcase is 100% for demonstration. If you create an issue ticket, it is likely to be marked as wontfix because there is nothing to fix.