Recently, i upgrade mediawiki version 1.18.0...
And I met the file upload problem....
The message is below...
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
$wgCheckFileExtensions = false;
$wgStrictFileExtensions = false;
$wgVerifyMimeType = false;
$wgShowIPinHeader = false; # For non-logged in users
$wgUploadSizeWarning = 0;
$wgEnableUploads = true;