Problem since update 3.5 [duplicate]

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Short explanation

The $wpdb->prepare() method works similar to sprintf()/printf() and therefore needs more than one argument (else it’s senseless to use it at all).

So if one of your plugins or the theme makes a DB call, which is prepared to protect you against cross script attacks and similar and doesn’t do it properly, WordPress throws a message to notify you update that.

Repeat each step and reload. If it worked, you’re done. If not, proceed to the next one.

  1. Update all your plugins
  2. Deactivate your theme and switch to Twenty*
  3. Deactivate all of your plugins – activate each one, reload.

If you found the error and it was your own code, go and fix it. If it was a plugin, head over to the forum/Issue tracker and tell the author.

The magic of search

A plain normal Google search for

Missing argument 2 for wpdb::prepare()

reveals hundreds of results …