--- ../denemo-cvs/denemo/src/mousing.c	2007-01-24 19:44:26.000000000 +0000
+++ denemo/src/mousing.c	2007-10-20 16:28:03.000000000 +0100
@@ -18,7 +18,7 @@
 offset_from_height (gdouble height, enum clefs clef)
 {
   /* Offset from the top of the staff, in half-tones.  */
-  gint half_tone_offset = (gint) (height / HALF_LINE_SPACE + 0.5);
+  gint half_tone_offset = ((gint) (height / HALF_LINE_SPACE+((height>0)?0.5:-0.5)));
 
 #define R(x) return x - half_tone_offset