Omega + Breadcrumbs in forums

Have you renamed the function?
Your caches will need to be cleared for the function to be used from the template.php.

It needs to be called themename_breadcrumb()

The various $zen_variables will need renaming & you'll need to check that the custom theme has the same variables. Install devel module & use it's variable editor to view the variables for your subtheme.

Also use…
dsm($variable, "Var name");
…to print the variable via the devel module to be sure that the code is running.

I guess there may be modules that will allow you to specify breadcrumbs via the GUI, but I don't have any experience with them.

Thank you drew !

You pushed me in right direction - I'm now close to that I wanted :-)
I include the code for my subtheme's 'template.php' -
maybe someone else can reuse it...

/-----------------------/
function MYTHEME_alpha_process_page(&$vars) {
$theme = alpha_get_theme();
$vars['title'] = $theme->settings['toggle']['page_title'] ? $vars['title'] : NULL;
$vars['breadcrumb'] = $theme->settings['toggle']['breadcrumb'] ? MYTHEME_alpha_breadcrumb($vars) : NULL;
}
function MYTHEME_alpha_breadcrumb($variables) {
$breadcrumb = $variables['breadcrumb'];
if (!empty($breadcrumb)) {
$trailing_separator = $title = '';
$item = menu_get_item();
if (!empty($item['tab_parent'])) {$title = check_plain($item['title']);
} else {
$title = drupal_get_title();}
if ($title) {$trailing_separator = ' : ';}
if ($title) {
if (stristr( $breadcrumb, $title) ) {
$spos = strrpos($breadcrumb, '» ' . $title);
if ($spos) {
$breadcrumb = substr_replace($breadcrumb, ': ' ,$spos - 1, 2);
}
$trailing_separator = $title = '';
}
}
return $breadcrumb . $trailing_separator . $title;
}
return '';
}
/-----------------------/