Here's the image I meant to show you: http://i.imgur.com/RqgCW.jpg
As you can see, there are no scrollbars. This is probably a bug that
stems from platform differences, if it works in Windows and Mac OS X.
I do think adding drag-to-scroll would be a good way to navigate around
the map. Scrollbars are so clunky, and I don't really think that they
should be used for camera movement. After all, we have scroll wheels on
our mouses just so that we can avoid using those scrollbars.