I have a test site here (with WordPress 3.2.1)

Since I activate the multisite support, the add featured image disappear. I try to deactivate all the plugin and activate the default theme (twenty eleven with has add_theme_support ('post-thumbnail') by default) but nothing change. The post thumbnail show up normaly on the front but I can't edit them without this dialog box. Of course, I checked on the "option" tab and nothing appear too for the post thumbnail feature.

When I use WP_DEBUG, I get:

Notice: register_sidebar_widget is deprecated since version 2.8! Use wp_register_sidebar_widget() instead. in /home/patricet/public_html/wp-testsite/academie-sophro-v2/wp-includes/functions.php on line 3382

Notice: has_cap is called with an argument which is deprecated since version 2.0! The use of levels of user extensions and themes now prohibited. Use roles and capabilities in place. in / home/patricet/public_html/wp-testsite/academie-sophro-v2/wp-includes/functions.php on line 3466

In console (with Firebug) for .js I get:

The use of the property "nodeValue" of an attribute is deprecated. Use "value" instead

I can create an editor account if you need

Do you have a solution, an idea?


  • Try disabling plugins to see if it re-appears, also can you let us know if there are any errors in your JS console or your PHP error log?
    – Tom J Nowell
    Commented Nov 17, 2011 at 10:55
  • Thanks Tom. Like I said I disable already all the plugin and it change nothing. For the errors I will add to the the thread right now.
    – Gregoire
    Commented Nov 17, 2011 at 11:30

1 Answer 1


I find the solution. The problem start when I activate the multi site on the test site. In the network setting, in Upload Settings Everything works now.

  • Please mark your answer as The Answer. We have enough unanswered questions here. :)
    – fuxia
    Commented Jan 1, 2012 at 7:30

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