Index: media.php
===================================================================
--- media.php	(revision 23294)
+++ media.php	(working copy)
@@ -348,8 +348,8 @@
 		$crop_w = round($new_w / $size_ratio);
 		$crop_h = round($new_h / $size_ratio);
 
-		$s_x = floor( ($orig_w - $crop_w) / 2 );
-		$s_y = floor( ($orig_h - $crop_h) / 2 );
+		$s_x = apply_filters( 'image_resize_dimensions_crop_start_x', floor( ($orig_w - $crop_w) / 2 ) );
+		$s_y = apply_filters( 'image_resize_dimensions_crop_start_y', floor( ($orig_h - $crop_h) / 2 ) );
 	} else {
 		// don't crop, just resize using $dest_w x $dest_h as a maximum bounding box
 		$crop_w = $orig_w;