Index: wp-includes/class-snoopy.php
===================================================================
--- wp-includes/class-snoopy.php	(revision 8124)
+++ wp-includes/class-snoopy.php	(working copy)
@@ -1241,6 +1241,7 @@
 				reset($formfiles);
 				while (list($field_name, $file_names) = each($formfiles)) {
 					settype($file_names, "array");
+					$file_content = '';
 					while (list(, $file_name) = each($file_names)) {
 						if (!is_readable($file_name)) continue;