That should be corrected if anyone invents a time machine. :P
white-space: nowrapshould be
vertical-alignshould not apply to table cells. Instead the CSS3 alignment properties should exist in Level 1.
vertical-align: middleshould be
text-middlebecause it's not really in the middle.
fill-availablerather than being undefined in auto situations.
background-sizewith one value should duplicate its value, not default the second one to
z-indexshould be called
depthand should Just Work on all elements (like it does on flex items).
overflow-wrapshould not exist. Instead,
overflow-wrapshould be a keyword on 'white-space', like
currentcolorkeyword should have a dash,
border-radiusshould have been
hyphensproperty should be called
hyphenate. (It's called
hyphensbecause the XSL:FO people objected to
hsla()should not exist,
hsl()should have gotten an optional fourth parameter instead (and the alpha value should have used the same format as R, G, and B or S and L).
»and indirect sibling combinator should have been
++, so there's some logical relationships among the selectors' ascii art