My trouble is with multiple tags in the URL.
Before WP3.1 update, this was working fine :
http://mydomain.fr/tag/tag1+tag2
I had a page listing all the posts containing tag1 and tag2.
Now, this kind of url generates a 404 "not found" page instead.
Notice : the URL with only one tag still works :
http://mydomain.fr/tag/tag1
Any idea to restore this possibility to combine different tags in the URL ? I think it has something to do with my old theme, because the new default "Twenty Ten" theme for WP3.1 seems to work fine with multiple tags in the URL...
I only find this in the support about my issue:
http://wordpress.org/support/topic/query_posts-problem-with-multiple-tags-since-31-update
But it doesn't help me, as I am not coding a query, I'm just trying to get a list of posts while combining 2 tags in the URL.
Any suggestions will be appreciated. Thanks !!!