Index: imagefield_crop_file.inc
===================================================================
--- imagefield_crop_file.inc	(revision 131857)
+++ imagefield_crop_file.inc	(working copy)
@@ -35,7 +35,9 @@
 // create the path to the file to be used for displaying the crop interface.
 function imagefield_crop_file_admin_crop_display_path($file) {
   $file = (object)$file;
-  return $file->filepath .'.crop_display.jpg';
+  $path_parts = pathinfo($file->filepath);
+  $filename = $path_parts["dirname"].'/crop_display-'.$path_parts["basename"];
+  return $filename;
 }
 
 // Original file to crop from