--- opencv-1.0.0.orig/otherlibs/highgui/grfmt_jpeg.cpp	2006-10-16 13:02:49.000000000 +0200
+++ opencv-1.0.0/otherlibs/highgui/grfmt_jpeg.cpp	2007-08-11 09:10:28.000000000 +0200
@@ -181,7 +181,7 @@
             m_height = cinfo->image_height;
             m_iscolor = cinfo->num_components > 1;
 
-            result = true;
+            result = (cinfo->err->num_warnings == 0);
         }
     }
 
@@ -405,8 +405,9 @@
                         icvCvt_CMYK2Gray_8u_C4C1R( buffer[0], 0, data, 0, cvSize(m_width,1) );
                 }
             }
-            result = true;
+
             jpeg_finish_decompress( cinfo );
+            result = (cinfo->err->num_warnings == 0);
         }
     }