Comment 3 for bug 422511

From what I could understand of the murrine source code and the gtk source code, this is a gtk bug. Gtk asks the theme to draw a 14px wide scrollbar thumb and a 16px wide trough. The thumb should extend its click area along the entire width of the trough.
Would it be possible for the murrine engine to draw a 16px wide thumb with 1 px on either side transparent? That way you'd get the same visual effect without the compatibility and usability problems.