Media Uploader Featured Image

[fanderzzon]

When I use the regular media uploader for post types I can browse for my uploaded media images and set a featured image for the post.

When I press on the link to the right for set the featured image UI I can't browse for my uploaded media files.

In find out that a custom taxonomy cause a conflict in functions.php but I've been using that from Codex and It shouldn't cause a conflict. And if my theme is corrupt, why does the regular uploader for set the featured image still works?

1. Could you provide the code that causes a conflict?
2. If you use the same code on a clean install, is there still a conflict?

Functions file

Replying to SergeyBiryukov:

1. Could you provide the code that causes a conflict?
2. If you use the same code on a clean install, is there still a conflict?

I have included my functions file.
I have reset the database but still no effect.

On line 167, a 'type' taxonomy is registered, which is one of the ​reserved terms.

Related/duplicate: #12917

Replying to SergeyBiryukov:

Thanks for your incredible help!

Of all terms I could chosen I picked a reserved one ;)