I tried this :
http://wordpress.org/support/topic/custom-post-type-tagscategories-archive-page?replies=24
It seems to be the same issue, but using regular tags, not custom taxonomies. That didn't seem to change anything. I saw that in the code provided, there was a conditional checking if it was a category or a tag. I tried to add a condition about my custom taxonomy using the function : is_taxonomy('name') but that returned false no matter what.
I got curious, so I tried to see all the registered taxonomies with this :
$taxonomies=get_taxonomies('','names');
foreach ($taxonomies as $taxonomy ) {
echo '<p>'. $taxonomy. '</p>';
}
And my custom taxonomies didn't show up ?!?
Isn't more-taxonomies plugin registering the custom taxonomies ? Any experience on that ?
Without any help, I might drop the plugin and try to get it done manually... too bad, it really worked smoothly up to this point.