admin search of pages returns custom post types

Question

I was looking for a particular page today and got search results that surprised me. Here's what happened:

• start on Dashboard->Pages->All Pages
• search "standard"
  • URL= http://example.com/wp-admin/edit.php?s=standard&post_status=all&post_type=page&action=-1&m=0&paged=1&action2=-1
• get list of some pages, some posts, some custom posts of types ash_dyeing and ash_loomsong
• try searching a different term and receive error message: "Invalid post type"

So I wondered if all the admin post searches were wonky. I tried again from

• Dashboard->Posts->All Posts
  • http://example.com/wp-admin/edit.php?s=standard&post_status=all&post_type=post&action=-1&m=0&cat=0&paged=1&mode=list&action2=-1
  • posts, pages and custom post types returned
• Dashboard->Dyeing Samples->All Dyeing Samples
  • http://example.com/wp-admin/edit.php?s=standard&post_status=all&post_type=ash_dyeing&action=-1&m=0&paged=1&mode=list&action2=-1
  • posts, pages and custom post types returned

As you can see, all the urls are the same except for post_type=X, which appears to be ignored. Why might that happen and how can I fix it?

System details:

-wp 3.3.1 -theme: Suffusion 3.9.6 with child theme

ETA:

Turns out this is a plugin problem, specifically Events Manager 5.0.51. It can be resolved by setting the plugin's 'Include in WordPress Searches?' option to 'yes'

Answer 1

It's hard to say what's actually causing the issue, but it isn't WordPress. Try deactivating all themes and plug-ins, a reactivating them one by one until the problem occurs to isolate the plug-in/theme responsible. You'll have to contact the developer and they may look into it for you.