Recently, i upgrade mediawiki version 1.18.0... And I met the file upload problem.... The message is below... Upload warning The file is a corrupt or otherwise unreadable ZIP file. It cannot be properly checked for security. But I had upload file on version 1.17.x and my settings seems to be correct.. $wgCheckFileExtensions = false; $wgStrictFileExtensions = false; $wgVerifyMimeType = false; $wgShowIPinHeader = false; # For non-logged in users $wgUploadSizeWarning = 0; $wgEnableUploads = true; -- ether0924@gmail.com,ether0924@paran.com