I'm running several pages plus one menu item showing the posts in category "Blog." (There may be a better way to pull up all posts, but I may want to split this into 2 apparent "blogs" later.) In Twenty Ten and in several other themes I've tried (filtered for recent update and/or mention of 3.0), the menu works fine and clicking on menu item Blog displays the category archives.
BUT when I click on a blog entry title, I just get a refresh of the category archives page: multiple entries, plus the same sidebar configuration.
I haven't messed with the Twenty Ten theme. What could be going wrong?