Please note that you should not have posted in the "water cooler" forum for a specific template problem - please post in the appropriate template or extension forum in future (of course you will need to renew your membership to do that - our priority is to always answer our paying members first).
Use this code...
#rt-breadcrumbs .block-shadow {
box-shadow: none;
}
#rt-breadcrumbs .rt-block {
background-color: transparent;
}
This is how to create a custom CSS compatible with Gantry 4...
Simply create a file called "<TEMPLATENAME>-custom.css" and put this file in the CSS folder of the template (where <TEMPLATENAME> is the name of the template as seen in template manager e.g. rt_fracture). GANTRY4 will automatically load this CSS file. If you wish, you can also have browser specific files by appending, for example, "-ie9" making the filename "<TEMPLATENAME>-custom-ie9.css"
Regards, Mark.