When a bar has a large label, the bars are shifted up incorrectly. It seems to be ok with two lines but not three. We're using autogenerating the graph based on user added content so are unable to control the length. We could limit the amount of characters but this would risk losing contextual information. I've posted a screenshot the help show the issue.
https://dl.dropbox.com/u/5454906/bar_graph_screenshot.png