Uploading backgrounds just got easier! It is so simple and you don't have to mess with your html code!
First, make sure your blog template is set as "Minima"
To Upload Background:
1. Click on the "Customize" button on the top of you blog
2. Click the "Layout" tab
3. Now click the "add a gadget" button
4. Select "html/java script" button
5. Now copy the new code for the background and paste it into the content box
6. Click "save" and now you have a fabulous new background!