I have this problem for a while now, I have searched the web for answers, but I could not find a good answer related to my problem.
You can see that I render my own set of tiles. The problem is that the markers are repeated horizontally, because of the wrapped map. I can't use the zoom in trick to avoid this problem, because the map has to be dynamic so it supports multiple resolutions.
I hope someone knows how to deal with this problem! I would really appreciate it.
I use Google Maps API v3.
Here is another screenshot: