Dots fix to work around mod_mime problem. Props skeltoac.

git-svn-id: http://svn.automattic.com/wordpress/trunk@3822 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/admin-functions.php

@@ -1877,6 +1877,7 @@ function wp_handle_upload(&$file, $overrides = false) {
 			else
 				$filename = str_replace("$number$ext", ++$number . $ext, $filename);
 		}
+		$filename = preg_replace('#\.(?![^.]+$)#', '-', $filename);
 	}
 
 	// Move the file to the uploads dir