Upgrading Drupal

I am getting this error message after upgrading cck imagefield:
warning: mkdir() [function.mkdir]: File exists in /var/www/vhosts/domain.com/httpdocs/cms/sites/all/modules/imagecache/imagecache.module on line 483.

The following modules are installed:
1. cck imagefield - 6.x-3.0-alpha2
2. cck filefield - 6.x-3.0-alpha5
2. imagecache - 6.x-2.0-beta2

Drupal version 6.6
I have checked on permissions but they all seem fine.

Does anyone have a similar problem?

Hello,
I upgraded and moved a site from D5.12 to D6.5 as a multisite (it was stand-alone) and that was fairly smooth -- there was a cache issue but it resolved when I ran update.php, it seems. Now, however, my admin navigation is duplicated and when I click on admin --> Menus I see duplicates of all content and admin menus, and I have two Primary Menus, one empty (but only one Secondary Menu).

How can I fix this, and does it signal even bigger probs with the upgrade/move?

thanks.

I'm working on an older installation of Drupal, and over the years a number of bugs have come up. As I browse through the forums seeking advice on these various problems, a common theme of advice I've seen other people give to people like me is that I should upgrade to the newest version of Drupal.

After upgrading I had lots of errors...don't know where to start on listing them... but the strangest thing is how my links to my various pages are tripled in my navigation. Even links for things such as "administer" are duplicated.

Any idea what is going on?

Since I badly did something wrong, my site has crashed and lost all access to admin pages. I don't even know if they exist still somewhere.

The DB seems to be ok as far as I can undestand. I have backed it up now.

I am upgrading my drupal to 6.6 from 6.2 (crashed version). My site still shows the theme, some custom created blocks and new users block as well as header and footer (and nothing else).

I have not before performed any upgrade functionality and I am not sure if it will work at first go without crashing the site even further.

After upgrading CCK I get the following two errors:

mysqli_real_escape_string() expects parameter 2 to be string, array given in /home/myusername/public_html/main/includes/database.mysqli.inc on line 323

preg_match() expects parameter 2 to be string, array given in /home/myusername/public_html/main/includes/bootstrap.inc on line 737

I get the database.mysqli.inc error on the front page, where a list style block is supposed to display (but doesn't while the error message shows).