WordPress

Fix Updates On Hosting With 1&1
The problem I was having was the update would start, and then just stop after a few seconds.

Then in my wp-content folder I would see a bunch of failed downloads. They were the update zip files with a 0 byte size.

The Solution:

Add the following line to your .htaccess file in the root directory of your blog.

AddType x-mapp-php5 .php

This will enable PHP version 5 + on your blog and then your update should take off.

http://www.big-webmaster.com/wordpress-automatic-update-with-1and1/