Unable to load user with ID: 42

You're right, the error doesn't occur anymore.
Thank you

OK thanks for taking time to verify this.

Regards

I may have found the origin of the problem in Flexicontent :

I have created the first article of the site and used the 'uncategorized' category which is the default one set up at the installation if Joomla.

When I asked the articles of this category ('uncategorized') I got the error.

When I asked directly the article everything was OK.

I have created a new category 'cat1' and I have linked the article to this category.

Now everything is OK.

I think the problem was to show a categroy where the creator is unknown give the 'unlable to load'.

If my theory is correct it's meaning that we cannot delete a user who has created an article, a category...

I am checking this to suppress warnings of deleted author or maybe more ...

I had the same issue and as i propose a solution :
just connect to phpmyadmin, select the database and select jos_user ... if you change admin ID in the database, the message is going away

Have you installed r1465?

i have suppressed warning of deleted author in items code,

in which view are you getting this?