Where does flicker come from?

Hello,

We say in checkpoint 7.1 of the Web Content Accessibility Guidelines
[1]:

 Until user agents allow users to control flickering, 
 avoid causing the screen to flicker.

I'd like to tell the UA WG how flicker may be caused so
that UAs can prevent it. Can someone explain what markup
or settings lead to flicker?

Thank you,

 - Ian

[1] http://www.w3.org/TR/WAI-WEBCONTENT/#gl-movement

-- 
Ian Jacobs (jacobs@w3.org)   http://www.w3.org/People/Jacobs
Telephone May 1999 only:     (212) 688-4489
Cell phone May 1999:         (917) 450-8783
Otherwise Tel/Fax:           (212) 684-1814

Received on Monday, 24 May 1999 14:48:22 UTC