[Bug 768] Warn about background-color transparent

http://www.w3.org/Bugs/Public/show_bug.cgi?id=768





------- Comment #9 from ot@w3.org  2007-07-17 06:15 -------
We moved the "level" of this warning to the lowest level, amongst other
warnings of potential accessibility issues. 

I think this is the closest we can get to consensus. 

Moving to [close] this bug.