There is a horizontal line running across the middle of the image in the above URL that shouldn't be there. (The incorrect positioning of the image is related to bug 1808.)

Setting all current Open/Normal to M4.

per leger, assigning QA contacts to all open bugs without QA contacts according to list at http://bugzilla.mozilla.org/describecomponents.cgi?product=Browser

I've fixed the placement issues of the floaters in the test; the rendering issue is a table rendering bug...The horizontal line appears somewhere near the middle of the tables that are used to represent the placement of the floaters...Probably a bug not-worth-fixing

Retitling bug... why did I think that was an image?

Actually, the line is the result of the image "blank.gif", which doesn't exist, but is sized to the width of the cell and a height of 1. 4.x does the same thing, although IE manages to hide the image. I don't really know what should be done, but probably this bug is just invalid.

Moving to M8

Agreed. Marking as verified invalid.