there are 2 problems with test:

1. test failed (show error status) because bug id is incorrect;

line
@bug 4140484 (Heavyweight components inside invisible lightweight containers still show)
should be replaced on
@bug 4140484

2. test always failed after modification bug-line if GNOME panel is on top (see CR 7112115) but test failed intermittently when the panel orientation is set to "Bottom"

see comments for detail