Tracy wrote a patch a while ago to fix this:
see: http://groups.google.com/group/route-me-map/msg/722a84cf5ae14b52
The issue is that if you have a marker behind another marker, you can never
click on the marker in back.
Original issue reported on code.google.com by Quazie on 15 Mar 2009 at 3:54
Original issue reported on code.google.com by
Quazie
on 15 Mar 2009 at 3:54