This is the tale of a mystery and intrigue about the disappearance of the css from a blogs dashboard and how we hunted it down and fetched it back.

Thord Daniel Hedengren, one of the writers for Blog Herald, put out a plea for help on twitter and was pointed in my direction.

He was faced with a WordPress dashboard which looked like this and wasn’t much use:

This evening I hooked up with Thord and with the help of his server administrator we tracked down the issue and thought it a good idea to spread the message to help any one else out there who has a similar issue in the future.

I started off by looking at the headers returned by the php file which concatenates all the CSS files together and noticed something strange:

HTTP/1.1 200 OK
Server: nginx/0.7.62
Date: Tue, 29 Sep 2009 19:34:47 GMT
Content-Type: text/css;charset=“utf-8″
Connection: keep-alive
X-Powered-By: PHP/5.3.0
Expires: Wed, 29 Sep 2010 19:34:47 GMT
Cache-Control: public, max-age=31536000
Vary: Accept-Encoding

As you can see here the Content-Type header looks a little strange, it has a charset specified but the value being returned is not a valid charset and it looks like this is probably why Firefox is refusing to apply this css file to the page.

This was starting to look like a server configuration issue so we got in contact with the server admin and we tracked down the errant configuration to the php.ini file.

Within the php.ini file you can set a default charset to be used if one has not already been specified for the request this had erroneously been set in the file with some smart quotes rather than normal quotes and so php was outputting the smart quotes as well as the charset name into the HTTP header.

Now the headers look like this and Firefox is happy to display a fully styled WordPress dashboard:

HTTP/1.1 200 OK
Server: nginx/0.7.62
Date: Tue, 29 Sep 2009 19:39:17 GMT
Content-Type: text/css;charset=utf-8
Connection: keep-alive
X-Powered-By: PHP/5.3.0
Expires: Wed, 29 Sep 2010 19:39:17 GMT
Cache-Control: public, max-age=31536000
Vary: Accept-Encoding

In short, check the configuration you use for default_charset in your php.ini file and don’t use any quotes unless you need to the following works fine in my testing:

default_charset = utf-8