Changing the permalinks back to default fixed the issue. I was using custom permalinks. Thanks @msrpabs for diving in with me.
I changed the permalinks here: blogaddress.com/wp-admin/options-permalink.php.
I didn’t start using the custom permalinks until I published the first two blog entries. So I’m wondering if there is a chance that the category links, et-al, on the site were looking for /?p=43 instead of /blog-post-title making them pull up blanks. I’ll have to test that.