With other minor blog changes being made I thought I would upgrade to version 2.22 even though I just put 2.21 in a couple months ago. The blog main page comes up just fine and the link to my affiliated site, but I get a 404 error on other internal links to full posts, archives, the about page, etc. When I take out 2.22 and put 2.21 back in, I now continue to have the same problem, so I do not know what I did. In past upgrading I got an upgrade script, this time nothing, do not know if that matters. Even though I did not back it up beforehand, my data still seems there and unaffected. Any suggestions as to where I am going wrong would be appreciated. Thank you sincerely.