CSS | Border-color: transparent

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Pois é

O VS 2008 diz-nos:
"transparent is not a valid value for the border-color property"

mas a verdade é que funciona senão confirmem o seu uso.
a w3c já emitiu este "bug" na errata.
isto é verdadeiramente útil no breadcrumb do sharepoint para evitar saltos de pixeis no hover dos links

confirmem em:
http://www.w3.org/Style/css2-updates/REC-CSS2-19980512-errata.html
e
http://www.w3.org/TR/css3-color/

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