For ever so long now, Galeon has had a nagging problem with the Gecko
scrollbars. The scrollbar keeps focus when, after grabbing the scrollbar
(left-mouse-button on scrollbar, scroll up or down) the mouse button is
released outside the Gecko-governed area of the browser window, but INSIDE
the window over one of the toolbars (including the menu bar). When (after
releasing the left-mouse-button inside the browser window, but outside the
Gecko-governed area) the pointer is moved inside the Gecko-governed area,
the window scrolls with the pointer.

To stop this from happening, the user needs to click the left-mouse-button
inside the Gecko-governed area once. The behaviour is present both for
horizontal as well as vertical scrollbars. It does not matter where the
toolbars are in the browser window  (top, bottom, sides). The behaviour is
also present for any scrollbars inside the document (eg. the scrollbar to
the right of the <TEXTAREA> in which I'm composing this bug report).

Reproduce:

 1. open a document which is larger than the document window, so that a
scrollbar appears.
 2. grab the scrollbar (left-mouse-button down and hold)
 3. move the pointer (while holding the left-mouse-button down) outside the
Gecko-governed area, over one of the toolbars.
 4. release the left-mouse-button over one of the toolbars.
 5. move the pointer back inside the Gecko-governed area, and move it
down/up. The document will scroll with the pointer.
 6. to stop the document from 'following' the pointer, left-mouse-button
click once inside the Gecko-governed area of the browser window (clicking
inside a toolbar does NOT stop this from happening).

Observed behaviour: the document 'follows' the pointer.

Expected behaviour: the scrollbar should loose focus, even when the
left-mouse-button is released outside the Gecko-governed area of the
browser window