No Gravatars Seem to show up

Well, this isn’t a biggie, but it’s been bugging me a bit. I’ll post it up in case anyone has a suggestion.

Whenever anyone leaves me a comment, I just get a red x wart instead of a gravatar.

On both the commentd end, and in the recent comments dashboard widget.

here’s an example img src link to a gravatr
http://1.gravatar.com/avatar/51e3df0200b17145365d44a3630d9515?s=50&d=http%3A%2F%2Fwww.rvoodoo.com%2Fempire%2Fwp-content%2Fthemes%2Fvoodooempire3%2Fimages%2FvoodooEmpire.png%3Fs%3D50&r=X

I have no idea how they should look, does that look properly formed….?

Now that I look at it, it seems something has gone wrong with code I use to drop in a default gravatar of my own if the user doesn’t have one….

// THIS ADDS CUSTOM DEFAULT GRAVATAR
if ( !function_exists('fb_addgravatar') ) {
    function fb_addgravatar( $avatar_defaults ) {
    $myavatar = get_bloginfo('template_directory').'/images/voodooEmpire.png';
    //default avatar
    $avatar_defaults[$myavatar] = 'The Voodoo Empire';
    return $avatar_defaults;
    }
 add_filter( 'avatar_defaults', 'fb_addgravatar' );
}

anybody see a conflict that would cause issues? I’ve been using that code for quite some time, I think maybe the problem started with WP3.0?

EDIT-Well, I don’t think it’s that code, when I switch to default theme the problem persists. Even with plugins deactivated. It looks like if I swap to generated gravatars, my gravatr shows up, but nobody else’s does. Not even the generated ones…. the link looks like this

http://1.gravatar.com/avatar/51e3df0200b17145365d44a3630d9515?s=50&d=monsterid&r=X

So I have no idea