Thread:Extension talk:Bootstrap/Bootstrap in Vector Skin/reply

Hello,

this could have a lot of causes. You could turn on PHP error messages (Manual:How_to_debug) and load the page in debug mode (i.e. append  to the URL). Then use Firebug to see if the CSS is loaded correctly or if there are any errors reported. With the page in debug mode you could also look up the URL of the CSS in the page's HTML source and follow that link (in Firefox just hit Ctrl-U and click on URL in the &lt;link&gt; tag).

(Is your wiki public?)