Percentage not valid for column-gap?

Back in 2001 percentage was avalid unit for this attrbute
http://www.w3.org/TR/2001/WD-css3-multicol-20010118/#column-gap
Today it isn't? http://www.w3.org/TR/css3-multicol/#column-gap

Anyone know why? Seems to make sense from an author perspective, so
why did it vanish?

/via http://twitter.com/owltastic/status/170247532822274049

Received on Thursday, 16 February 2012 20:51:05 UTC