I deactivated plugins one by one. Cforms was the problem. Deactivating and reactivating fixed this issue.
Thank you for your suggestion. It worked!
Eleanor
Thanks for your help.
This issue was a result of not having enough room on the server to update. Once I increased the size everything worked beautifully and I was able to update.
Eleanor
Thank you Joshua.
The code you provided seems like it would only allow me to create one background image for multiple links. I am looking for a unique image for each link in the navigation.