If you have a blog powered by WordPress and you’re using a theme based on “Default” or “Kubrick” you need to change to another theme.
The issue is that these themes do not play nicely with many of the HTML5 parsers in forthcoming browsers.
The bad news is that WordPress shipped with default themes based on Kubrick up until the recent 3.0 WordPress release, so there are hundreds of thousands of sites using these themes.
In many cases these sites will not display properly on Firefox 4.0, Chrome 9, Opera 11.5, or IE9. They do work in Firefox 3.6 and other earlier browsers.
If you’re running a WordPress powered blog, right now would be a good time to download the Firefox 4 beta and check your site.
There’s a warning post in the WordPress Forums on the topic, and more details in Bug 638487.
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Copyright © 2008-2013 Richard A. Milewski
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These aren’t victims of progress, it is once again bugs that browser developers aren’t fixing. The page works fine in Opera 11 so kudos to them. I am rather disappointed that this wasn’t considered a blocker, when it means thousands of people’s sites will look horrible due to the browser. The fact that you mention all these other browser almost seems to be your way of saying it is OK that Firefox does this too. This has nothing to do with progress, this has to do with poor coding.
Chris
Actually, it doesn’t work in the latest Opera build, the one with the HTML5 parser. (Opera 11.5 Labs build 24581).
I’ll leave it to those far more knowledgable than I to determine whether it’s a problem with the parser, the spec, or the WordPress theme.
Forcing everything to work the way it always did is how we wound up with huge parts of the world thinking that IE6 was a standard.