Thread:Project:Support desk/CSS is not loading properly

I've been up and down Google for the last few hours and I'm completely stumped for this problem. I've been using PHP for years but I have no idea of MediaWiki's inner workings and this completely escapes me.

I have a Wiki running on MediaWiki 1.18 (just upgraded today to see if it would fix the problem; it did not). For a long time everything has been completely find (a glitch here, one there, nothing serious). Two days ago, a user came to me and told me that the website looked "odd". When I asked to see what he meant, he showed me a site with no formatting (except inline styles)--that is, Times New Roman, white background, etc. I thought it might be his computer only, but then a second user came forward, and I checked it on another computer of mine, and it had the same issue. Mystified as to why I did not have this error on my main computer, I cleared my cache. Lo and behold, the CSS became blank.

Using Chrome's inspect element, I found the URLs of all the loaded stylesheets (3, to be exact, all loaded from load.php), and opened them in a new tab. Everything worked--that is to say, all of the CSS printed out properly. However, when I view the same resource in Chrome's resources tab, it is blank.

Oddly, even though the JS is loaded from load.php, it is working fine.

When reloading the page with "Inspect Element" open, I get this warning: Resource interpreted as Other but transferred with MIME type undefined. However I'm not sure if this is related. (My guess is that it is not.)


 * MediaWiki: 1.18.0
 * PHP: 5.2.14 (cgi-fcgi)
 * MySQL: 5.0.91-log

Attached are links to a few images. This issue happens in both Chrome and Firefox (other browsers untested) and on multiple computers as aforementioned.
 * http://imageshack.us/photo/my-images/856/cssfail1.jpg/
 * http://imageshack.us/photo/my-images/208/cssfail2.jpg/
 * http://imageshack.us/photo/my-images/833/cssfail3.jpg/
 * http://imageshack.us/photo/my-images/841/cssfail4.jpg/

Again, I must emphasize that this problem just started a few days ago. (The Wiki has been up since September 8th.) Except for a few additions to Vector.css, nothing has been changed. Any help or advice is appreciated. Been banging my head on my desk for hours now!