[Gmone3] Mailto: not working with default application set to zimbra desktop

[nyjetshead]

F16 x64 Linux
When I click on a mailto link in a web page, the mail app is not being activated.

I moved a copy of the launcher to /usr/share/applications

I added %U at the end of the Exec= line

I also added the following line:
MimeType=message/rfc822;x-scheme-handler/mailto;

I can select zimbra as the default mail application in system info

Is anyone using ZD with a gnome3 desktop?

Thanks!