This is an archived snapshot of W3C's public bugzilla bug tracker, decommissioned in April 2019. Please see the home page for more details.
In section 3.5.1 Applying CSS Properties to WebVTT Node Objects: http://dev.w3.org/html5/webvtt/#applying-css-properties-to-webvtt-node-objects "The 'color' property on the (root) List of WebVTT Node Objects must be set to 'rgba(255,255,255,0)'. [CSSCOLOR]" The default alpha channel of the text color should probably be 1, not 0.
oops!
Checked in as WHATWG revision r7075. Check-in comment: Make all cues readable... http://html5.org/tools/web-apps-tracker?from=7074&to=7075