Title: [Plugin: WP-Markdown] Errors when editing posts
Last modified: August 20, 2016

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# [Plugin: WP-Markdown] Errors when editing posts

 *  [mrdwab](https://wordpress.org/support/users/mrdwab/)
 * (@mrdwab)
 * [13 years, 9 months ago](https://wordpress.org/support/topic/plugin-wp-markdown-errors-when-editing-posts/)
 * I just updated to the latest version of this plugin, and I’m getting the following
   error when editing a post. (It doesn’t show when I’m writing a new post.)
 *     ```
       Warning: call_user_func(Markdownify_Extra::flushStacked_ul) [function.call-user-func]: First argument is expected to be a valid callback in /path-to-site/wp-content/plugins/wp-markdown/markdownify/markdownify.php on line 392
   
       Warning: Cannot modify header information - headers already sent by (output started at /path-to-site/news/wp-content/plugins/wp-markdown/markdownify/markdownify.php:392) in /path-to-site/news/wp-includes/option.php on line 563
   
       Warning: Cannot modify header information - headers already sent by (output started at /path-to-site/wp-content/plugins/wp-markdown/markdownify/markdownify.php:392) in /path-to-site/wp-includes/option.php on line 564
       ```
   
 * Any suggestions?
 * [http://wordpress.org/extend/plugins/wp-markdown/](http://wordpress.org/extend/plugins/wp-markdown/)

Viewing 3 replies - 1 through 3 (of 3 total)

 *  Thread Starter [mrdwab](https://wordpress.org/support/users/mrdwab/)
 * (@mrdwab)
 * [13 years, 9 months ago](https://wordpress.org/support/topic/plugin-wp-markdown-errors-when-editing-posts/#post-2946440)
 * By the way, reverting to an earlier version solves the problem for me.
 *  [Le Duy Quang](https://wordpress.org/support/users/doobbe/)
 * (@doobbe)
 * [13 years, 8 months ago](https://wordpress.org/support/topic/plugin-wp-markdown-errors-when-editing-posts/#post-2946564)
 * Me too, errors after upgrade wordpress 3.4.2
 *  [Le Duy Quang](https://wordpress.org/support/users/doobbe/)
 * (@doobbe)
 * [13 years, 8 months ago](https://wordpress.org/support/topic/plugin-wp-markdown-errors-when-editing-posts/#post-2946566)
 * I can’t highlight first code on post. Error after saved post:
 * `Warning: call_user_func() expects parameter 1 to be a valid callback, class '
   Markdownify_Extra' does not have a method 'flushStacked_ul' in /home/wp/public_html/
   wp-content/plugins/wp-markdown/markdownify/markdownify.php on line 392`

Viewing 3 replies - 1 through 3 (of 3 total)

The topic ‘[Plugin: WP-Markdown] Errors when editing posts’ is closed to new replies.

 * ![](https://s.w.org/plugins/geopattern-icon/wp-markdown_d5ecec.svg)
 * [WP-Markdown](https://wordpress.org/plugins/wp-markdown/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/wp-markdown/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/wp-markdown/)
 * [Active Topics](https://wordpress.org/support/plugin/wp-markdown/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/wp-markdown/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/wp-markdown/reviews/)

 * 3 replies
 * 2 participants
 * Last reply from: [Le Duy Quang](https://wordpress.org/support/users/doobbe/)
 * Last activity: [13 years, 8 months ago](https://wordpress.org/support/topic/plugin-wp-markdown-errors-when-editing-posts/#post-2946566)
 * Status: not resolved