MU Blog Update

I have updated my MU Blog yesterday and it said an error occured could not update. Anyhow, I noticed that when I went back to my site I have lost my navigation links in the menu bar on my home page. How do I get them to show up? I was able to see them when I logged into my network as a user and see the links on other pages but not the home page. I need help on how to restore them.