--- imagefield_file.inc	2008-12-03 22:49:14.000000000 +0100
+++ imagefield_file.patch.inc	2008-12-03 23:06:23.000000000 +0100
@@ -23,7 +23,7 @@ function imagefield_file_insert($file) {
   // create and admin thumbnail.
   if (imagefield_file_is_image($file)) {
     $info = image_get_info($file->filepath);
-    if($info['width'] < 100 || $info['height'] < 100) {
+    if($info['width'] <= 100 && $info['height'] <= 100) {
       $newfile = drupal_clone($file);
       file_copy($newfile->filepath, imagefield_file_admin_thumb_path($newfile));
     }