Index: includes/image.inc
===================================================================
RCS file: /viewvc/drupal/drupal/includes/image.inc,v
retrieving revision 1.39
diff -u -p -r1.39 image.inc

--- image.inc	2010-06-25 12:08:23.000000000 -0500
+++ image.inc	2010-06-25 12:09:23.000000000 -0500
@@ -120,7 +120,7 @@ function image_toolkit_invoke($method, s
  */
 function image_get_info($filepath, $toolkit = FALSE) {
   $details = FALSE;
-  if (!is_file($filepath)) {
+  if (!is_file($filepath) && !is_uploaded_file($filepath)) {
     return $details;
   }