i have some item who doesn't need category, k2 can't do that so i'm using joomla articles.
i use k2 breadcrumbs so:
-if i use joomla article i see article repeat
Home»About us»About us

-if i use k2 item for those i see "Menu" category and i have to hide that
Home»Menu»Abous us

so i have to avoid to repeat article name OR hide "menu" k2 category
this is pretty basic needs, i hope there is a solution

The K2 breadcrumbs are designed to be used with K2 items and follow the K2 item/category structure whereas the default breadcrumbs follow the menu structure.

For non-k2 elements such as articles where you need the menu structure instead it is best that you use the default breadcrumbs.

this is my issue:
i've a module who shows all subcategories (through k2 tools)
if i don't set k2 breadcrumbs module to ALL pages, it doesn't shows when i click in those subcategories through this module.
sorry for my english, is that clear?

Yes you made it clear :)

You have to map your content (K2 categories in this case) in order to control your modules.

It is a core Joomla! functionality.

do you mean add a menu item with the k2 categories?i already did that.
i reported myself with the link

Ok, for Joomla! articles you should use the default Joomla! breadcrumbs.

The K2 Tools module is designed for K2 Content and follows a different router than the default Joomla! breadcrumbs.