Sorry, not sure what would have caused the problem.
Can I suggest you do the upgrade in one step? It's not necessary to install all the intermediate versions. Just download the 1.7.0 tarball and then run the install script in upgrade mode. It'll take care of all the steps in between.
Since you're upgrading from a pre-1.5.0 version, make sure you have all your old config.php files (for Geeklog and for all the plugins) in place when you do the upgrade so that all your settings will be picked up.
The geeklog directory it is in the home direcotry not one level above because the provider doesn't allow user to do that. It is protected with .htaccess and .htpasswd files. Could this be reason of all the mess?
Sorry, not sure what would have caused the problem.
Can I suggest you do the upgrade in one step? It's not necessary to install all the intermediate versions. Just download the 1.7.0 tarball and then run the install script in upgrade mode. It'll take care of all the steps in between.
Luca,
About plugins, the last official releases are mediagallery plugin 1.5.1 and forum plugin 2.7.2
::Ben