Misplaced mouse selection when scrolled down

[strongheart1]

In a repo with very few commits, the height of the view (in lines) can be higher than the number of commit lines. I this case the view can be scrolled down, so that there are empty lines above the latest commit. Left-clicking on a line then selects not the line the mouse pointer is at, but a different line below.

[j6t]

I am not sure that Gitk is in error here. It could very well be a problem with Tk's canvas widget. If someone has a fix for this, be my guest. Until then, this falls into the "if it hurts, don't do it" basket.