Last modified: 2010-07-22 11:37:03 UTC
Firefox throws error messages for http://en.wikipedia.org/w/extensions/UsabilityInitiative/css/combined.min.css. The reasons are multiple @CHARSET declarations. Only one declaration at the start of the file is allowed, see http://www.w3.org/International/questions/qa-css-charset.
Fixed in r54647 by removing the @CHARSET declarations altogether.