If you move the vertical scroll bar with the mouse and then use a PageUp or PageDown key the scroll bar reverts to the position it had after the last PageUp or PageDown key - very annoying on a long file!
This seems to happen because the PageUp and PageDown keys move the insertion point but MouseUp on the scroll bar doesn't. Is this a deliberate design decision or an oversight?
I think its a deliberate design decision because there are a lot of other IDEs/editiors with the same behaviour like UltraEdit, Eclipse, VisualStudio, ...