Hello everyone. This is me, STUPID User...
Guess what, I was looking at the status report of my drupal installation, and see that there is a new release of Drupal (6.10) and a few new modules. Now, usually I prepare a backup of the site and then do the upgrade, but now I just thought that I should copy over the files as usual and then run upgrade.php, as I never had problems with the updates, so why should I have now... I thought.
But of course that something went wrong as Murphy law's says and I ended up with a dead site exactly when I did not make a backup. F*****g conicidence, isn't it...
Now, what I did to screw it over. The original version was 6.9, the new version was 6.10. I put the site in offline, the ftp'd the new files into the root, where they belong, and then ran update.php. I got a grey message stating that some lines were updated/deleted (something with src and language), and everything seemed to be ok, no errors, no noting. The problem is that after that I clicked back to administration pages, and nothing, it never opened. I closed the browser, went at the address/user again, I log in, but no matter what menu option I choose, I am greeted with the following message: