Omeka installation problem

Hello,
I just installed omeka 2.3 for a new website, I was used to 2.0.2.
After following installation steps, I could not launch installation by visiting http://mydomain.org/project, which returned an internal server error. I did manage the installation by viting http://mydomain.org/project/install/install.php.
But now to access every location of my omeka site (admin panel, index, items, simple pages...), I need to add "index.php" in the url (if I don't I still get the internal servor error).
For instance to access the admin panel:
http://mydomain.org/project/admin/index.php
To access an item:
http://mydomain.org/project/index.php/items/show/itemnumber
And to access the "about" simple page:
http://mydomain.org/project/index.php/about

This workaround is not very efficient, because I would need to apply it everywhere in the code of omeka...

Has anyone already encountered this issue? If so, how did you manage to solve it?

Thanks,
Fran├žois.

My first guess is that something is amiss with the .htaccess file. Maybe double-check that the new file for 2.3 was uploaded along with the rest of the files.

Thanks for the quick reply.
I checked and the .htaccess file has been correctly uploaded. Do I need to change something in it?

Hello, I still have the same problem. Any idea how to solve it?
Thanks.

Usually not. From what I can tell, it looks like the rewrite rule RewriteRule .* index.php is not being applied correctly.

What OS / version and version of Apache are you running?