--- OpenCV-2.1.0.orig/src/cv/cvcornersubpix.cpp	2010-04-06 03:24:43.000000000 +0200
+++ OpenCV-2.1.0/src/cv/cvcornersubpix.cpp	2010-08-20 15:57:38.000000000 +0200
@@ -184,7 +184,7 @@
 
             IPPI_CALL( icvGetRectSubPix_8u32f_C1R( (uchar*)src->data.ptr, src->step, size,
                                         src_buffer, (win_w + 2) * sizeof( src_buffer[0] ),
-                                        cvSize( win_w + 2, win_h + 2 ), cI ));
+                                        cvSize( win_w + 2, win_h + 2 ), cvPoint2D32f(cI.x - 0.5, cI.y - 0.5) ));
 
             /* calc derivatives */
             icvSepConvSmall3_32f( src_buffer, src_buf_size.width * sizeof(src_buffer[0]),