damiancomans

@jhaba For me there was no login screen, just a blank page. I could get the login screen by going direct to the wp-login.php file, however after logging in it would just divert to a blank page at wp-admin/upgrade.php?_wp_http_referer=%2Fblog%2Fwp-admin%2F

I have fixed my issue by using the steps outlined above so no need for me to reply any further. This topic should not be closed yet though as weeklyfun still needs to fix their site. My solution may or may not work for them, was just putting it out there in case it does.

I had exactly the same issue. Took me 2 nights to figure out so thought I should share how I got around it. I also tried all of those steps you mentioned above as well as many other things and had no luck. Here’s what did work for me in the end:

Put blog url into this site:
http://ismyblogworking.com/

That told me I was still on version 3.3.2 (not 3.4.1 as I know was uploaded). To me I guessed that the database must not have actually been updated.

I re-uploaded via FTP version 3.3.2

That let me access the admin panel finally.

I then deactivated all plugins. Tried updating at that point to 3.4.1 again but it failed.

Next I installed and ran the following database clean up plugin: TentBlogger Optimize WordPress Database Plugin

After that had run I was able to update to 3.4.1, and reactivate all plugins without any problems.

That’s what worked for me as with my host I have no access to the database (it’s a side blog off my main portfolio site). For people that do have cpanel access, you could try the following:

http://www.clickonf5.org/2247/solution-database-upgrade-required/

For version 3.4.1, the database version (db_version in wp_options) changed to 21115.

Good luck!