when i config in menupoint "Home" a category-blog and join by "join category" all categorys - save this, then it's work fine. all articles from all category (market with main contributions) will be show. When i open the menu point "Home" second one and save ist, the information for category "all categorys" will be lost and no article are there on frontsite.
i have this tested with j6.0 fresh installation with no other plugin/comp installations. this is on other sites too.