Right now we display w3c buttons, but there are some recent changes that may break the validation. Tools for Validation
http://placenamehere.com/pnhtoolbar/ for Mozilla, install as root run as user. CSS Validation
http://jigsaw.w3.org/css-validator/validator-uri.html Some tips:
Invalid
XHTML Validation
Tests are done on website tikiwiki.org, using W3C validator http://validator.w3.org . That list is not finished please help if you have 15 minutes to kill, get a page that is public, click on xhtml button at the bottom, and add the page to the list. If you can fix what makes it invalid, it's better even 😊 Invalid
Valid
Warnings
Notes
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