Added a document pane with a scrollable document within it, and when it's floated and maximized, the horizontal scrollbar is now underneath the task bar, making it impossible to horizontally scroll with the mouse.

Position/Orientation of the task bar doesn't matter- if I temporarily move my task bar to the right of the screen, I can't vertically scroll the floating panel, and if I move it to the top, I can't see the title bar.