Upgrading Drupal

Hello,
On the forum I have something I want to delete
it is the link to the previous question and see the following image:

how to delete

I recently upgraded to drupal 6.9 from 6.8. Everything went smoothly and running update.php gave no errors. I can log in as user 1 and see the main page and ?q=admin but nothing else =(. Every other page I try and access returns a "Not Found" error. My database is still intact.

Any help resolving this issue, I would like to get my site back on line asap.

-Cameron

Hi everyone,

Issue: Broken Clean URL functionality after upgrade to 6.9.
Symptom: No content can be accessed from menus or links (404 instead), unless "?q=" is manually inserted into URL. Clean URL reports that server does not support Clean URLs, although it was working before the upgrade. I made no changes to XAMPP, and followed the upgrade instructions to the letter.

XAMPP 1.6.8
+ Apache 2.2.9
+ MySQL 5.0.67 (Community Server)
+ PHP 5.2.6

I've just updated to 6.9, but now when I want to create a new node or edit an old one, I most often (but not always ???) get "Page Not Found" error, and no new content is saved (or edited)...

It has only occured on one node type so far, any ideas what/where the problem might be ??

I dove head first into Drupal about a month ago. Since then, I have learned a lot about Drupal and PHP and I almost have my site ready to go live. However, I did not read much about how Drupal was organized in the beginning and learned by doing as I went. Attempting to upgrade with the latest security patch (my first core upgrade) has revealed something to me. I am not using the modules organization structure appropriately. I have all of my modules installed to the root modules directory instead of being in the sites/all/modules directory.

i've update Drupal several times in the past with no problems.

however, after updating my 6.8 to 6.9 i am now faced with the following error:
Fatal error: Call to undefined function: node_types_rebuild() in /home/covoare2/public_html/daihinia/includes/common.inc on line 3653

this error also happens when i try to clear the cache.

any ideas or clues on how to resolve this?