Actually, I just called the wrong function. Fixing and discarding this review request.
Review Request #1680 — Created June 24, 2010 and discarded
The "ghost comment" mouseout event was calling a function called "removeRowFromSelectionIfUnselected", and this was throwing an error in my Firebug, because the function doesn't seem to be defined anywhere. I've removed it. Diff-viewer still seems to work fine.
All tests pass.