Some Server Configs Break CSS
There are at least three cases where the wiki CSS might be broken and wiki pages would be unstyled. These conditions are only present on certain server configurations:
#1
The server uses the Suhosin patch and limits request URLs to a lower number of characters than the submitted stylesheet URL.
#2
The server assumes that paths with .css in the request variable are an attempt to use the PHP interpreter for a CSS file and blocks the request.
#3
The server assumes that paths with a request variable named similarly to one of PHP's superglobals are an attempt to overload that superglobal and thus blocks the request.