The scrollbar wasn't really my concern, it was that you can't tell there is more to scroll to see. What about a little bar at the bottom with an inverted chevron pointing down to indicate there is more? (see my image.)
Or maybe when the window is sized, and there is more below the scroll, have it always cut off half way through the last achievement, that would be obvious it needs to scroll.
Also in the image, (I just captured,) there isn't any icons showing.
<img src="https://dl.dropbox.com/u/85412219/forumposts/achievements.jpg" border="0" />
I should have noticed Weishaupt's missing fetch, that was in my first post on the previous page. (Edit: page 19)