How to avoid shadow apply to a rich_marker in Gmaps4rails

Recently I've managed to dael with RichMarker and Gmaps4rails gem!开发者_运维技巧 Thanks to Apneadiving! But now there is a nasty shadow that I cant remove. tried

:shadow_picture => " "

and It even seems not to be in the CSS. And tried to do like it is told in wiki like

:marker_anchor => [10, true]

any ideas?

I updated the doc but didn't push the code...

Install v0.11.1 and use your correct code: :marker_anchor => [10, true]