We should be ignoring the entire declaration (i.e. property-value pair) when it includes invalid units. So this entire page should be boring with no surprises. Ho hum.
Border declaration: this should not have a border.
Margin declaration: this should not be indented left.
Margin declaration: this should not be indented down.
Padding declaration: this should not be indented left.
Padding declaration: this should not be indented down.
This should be in a normal font.
This paragraph should not have a background.