Hi, is there any way to retrieve all and only those posts in category 2 and 3 but not those only in 2 or only in 3?
I've tried it with query_posts, but the function doesn't accept more than 1 category id.
I've also found the taxonomy write up at boren.nu, that has some information about the "category__and" function in WP 2.3, but it says I'd have to write a plugin to use it.
If the latter is necessary, does anyone have an idea where to find any documentation for the $wp->set_query_var() function? I could not find any.
Thanks for every small hint!