I have a same problem here
When upgrade automatically I have some error:
Downloading update from https://www.ads-software.com/wordpress-3.0.1.zip…
Unpacking the update…
Verifying the unpacked files…
Installing the latest version…
Could not copy file.: /public_html/wp-admin/css/theme-editor.dev.css
Installation Failed
When I visit my site Vimax
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Before it was no problem when upgrade automatically but after I move to other hosting it should to put password before upgrade automatically, so I think I have to try upgrade via cpanel, I hope it’s working properly