* High Priority

warning.style-inside-comment: Do not put style rules inside HTML comments as they may be removed by user agent
warning.with-space: Family names containing whitespace should be quoted. 
warning.unknown-html: %s is not an HTML Element
warning.html-inside: HTML element can't be inside another element
warning.body-inside: BODY element can't be inside another element except HTML
warning.pseudo-classes: Anchor pseudo-class %s have no effect on elements other than 'A'
warning.noinside: %s can't be inside an inline element
warning.withblock: Be careful. Pseudo-elements can only be attached to a block-level element
warning.block-level: This property applies to block-level elements.
warning.no-declaration: No declarations in the rule
warning.out-of-range: %s is out of range
warning.marker: The marker-offset property applies on elements with 'display: marker'
warning.xsl: value %s only applies to XSL
warning.medialist : medialist should start with 'media :' %s
warning.direction: instead of using 'direction' for block-level elements use the new CSS3 'writing-mode' property
warning.noexistence-media: Property %s doesn't exist for media %s
warning.notforusermedium : Property %s doesn't exist for this usermedium
warning.noothermedium : Properties for other media might not work for usermedium
warning.incompatible: %s and %s are incompatible
warning.old_id:In CSS1, an id name can start with a digit ("#55ft"), [...]
warning.old_class:In CSS1, a class name can start with a digit ("#55ft"), [...]
warning.atsc : %s might not be supported by the medium atsc-tv
warning.otherprofile : property %s does not exist for this profile, but is validated conforming to another profile
warning.deprecated : this value is deprecated


* Low Priority

warning.same-colors: Same colors for %s and %s
warning.no-color: You have no color set (or color is set to transparent) but you have set a background-color. Make sure that cascading of colors keeps the text reasonably legible.
warning.no-background-color: You have no background-color set (or background-color is set to transparent) but you have set a color. Make sure that cascading of colors keeps the text reasonably legible.
warning.color.mixed-capitalization: Although color names are case-insensitive, it is recommended to use the mixed capitalization, to make the names more legible: %s
warning.same-colors2: Same colors for color and background-color in two contexts %s and %s
warning.no-padding: You are encouraged to have a padding area with a background color
warning.relative: Using relative units gives more robust stylesheets in property %s
warning.redefinition: Redefinition of %s
warning.relative-absolute: You have some absolute and relative lengths in %s. This is not a robust style sheet.
warning.no-generic-family: %s: You are encouraged to offer a generic family as a last alternative