For Firefox (Chrome's code has already been updated since I could still edit the comment), find and replace:

#footer {
padding: 1.5em 0 0 0 !important;
background: #ecf6ff!important;
}

with:

#canvas #page #footer {
padding: 1.5em 0 0 0 !important;
background: #ecf6ff!important;
}

This more specific code should prevent the old code from overriding other Dreamwidth layouts.