Index: JvDBGrid.pas
===================================================================
--- JvDBGrid.pas	(revision 13188)
+++ JvDBGrid.pas	(working copy)
@@ -4555,7 +4555,7 @@
     end;
 
     if not AtCursorPosition and HintWindowClass.ClassNameIs('THintWindow') then
-      HintPos := ClientToScreen(CursorRect.TopLeft);
+      HintPos := Mouse.CursorPos;
   end;
   inherited;
 end;