i often use grids to show data, also i use grids where the user can enter in information.
i have 2 problems

1 the user has clicked on row no 5 and then uses the scroll button to scroll down or up, he reaches say row no 200 and then decides to change that row, however when he uses the mouse and clicks on what he thinks as row 200 the screen scrolls back to row no 5, the only way he can actually come to row no 200 is by using the down /up arrow keys or page up/dn

2 i just cannot get the middle scroll mouse button to work in a grid.