The far left column is out of sync with the associated rows in the grader report in IE 8 (I'm on Windows 7). I'm attaching a screenshot to show you what I mean. The result is that sometimes there is a grade that looks like it's on the same row as the learner name, but it's actually the grade of the learner above.
In Firefox, this isn't an issue. I'll attach the Firefox screenshot in a reply to this post.