Clicking Preview in Multisite Creates 404 Error

[oateslarsen]

Since upgrading to Multi-Site, we've had an ongoing problem with individual blog owners being able to click on the Preview button to see how a draft item will appear before being published.

It seems this is specific to when network mode is enabled.

Upon further research, I found the following that clears up the problem:

go to the file template-loader.php in wp-include folder and comments the line number 7 which should be do_action('template_redirect'); so please make it like this

//do_action('template_redirect');

and it will sort out preview post issue in multisite setup. 

Indeed this does resolve the issue, however I HATE tweaking core files. I have searched within WordPress.org Forums as well as for any existing bugs here and was unable to find this registered as a "bug" nor could I find an answer to the problem within the Forum, so I wanted to be sure it is logged.

Andrea_r said to post here.

Thanks

[SergeyBiryukov]

Sounds similar to #16776 and #18069.

[wonderboymusic]

Steps to reproduce in trunk? Otherwise, works for me

[wpmuguru]

As a guess, this may have been a domain mapping related report. When 3.3 was released preview stopped working on installs that did not have the lastest version of domain mapping.

Suggesting we close until someone can provide some details.