I've had several strange issues with this upgrade. Usually I wait a few weeks until I make the switch, but went ahead this time after noticing the core packages from previous upgrades didn't really change.
I followed the instructions here. They were a little different than other instructions I've used. Once, I was done replacing all the WP files, I went to my main blog part of the site, and I received a fatal error.
I don't recall which page it directed me to. To fix it, I started replacing the pages from my backup. I had to do this a half dozen times, before I could get to my site and then the wp-admin. Some of the pages I recall were wp-includes/template.php, wp-admin/template.php, the list-table previously mentioned, and some temporary.php files.
My provider explicitly states it does not offer support for WP. I have not been able to do an auto-upgrade for months. I have relied on the manual upgrade. Auto-updates for plugins have been hit or miss since November. Currently, when I try to update 4 of my plugins, I receive the list-table error previously mentioned.
Does anyone have any specific questions I could ask my provider, as I believe some of the problems could be some conflict.
Any help would be appreciated.