Upgrading Drupal

I got this error
Fatal error: Unsupported operand types in /var/www/vhosts/sitename.com/httpdocs/includes/common.inc on line 1624
when I try to access to a not existing url, for example:
www.example.org/fantasyblblbl
How can I solve?
TIA

NOTE: I have reason to believe the previous installers wrote custom code into core files and modules... how can I upgrade without losing the current capabilies and presentation? The website is not very intensive now, but if it were to go down or have massive errors when I upgrade, I will be in big trouble!

www.usbestrepairs.com

Community member Keyz was able to point out a few problems by visiting my website:

1. Some of the site's contributed modules appear to be installed in the incorrect location. There is a /modules folder at the root, and that folder is only for Drupal core's use. Contributed modules should be installed in /sites/all/modules. This will make keeping the site up to date with the latest versions much easier. Doesn't help in D6 and D7, however I believe in D8 nearly everything you see in the root right now will be inside a "core" folder which you never touch except during site upgrades, to help make this point more clear. I see your theme is correctly installed at /sites/all/themes and some contributed modules are at /sites/all/modules. I suggest disabling a single module, moving that module into the directory, then re-enabling it. Then repeat for all contributed modules. You may want to extract a clean copy of Drupal 6 to see which modules need to stay in /modules.

I have Googled and found many references to these two issues I am having but no solutions - so far (maybe I blinked and missed something)

When I upgraded from D5 to D6 I started having issues with Update.php -

The upgrade directly from 6.22 to 6.24 appeared to go smoothly, but the Status Report still shows 6.22...

Any clues or suggestions?

Hi,

I am using drupal 7. I create one custome form.
How can I display that form in shadowbox or colorbox.

any idea?

Hi,

afer upgrading my Drupal 6 to 7.x the comments managments doesn't work!
The counting of unapproved comments works but there isn't any comment in the list.

See the screenshot:
Screenshot

Any suggestion?

Thanks

Gianni Benciolini