WordPress MU 2.8.3

WordPress MU is a multi user or multi blog version of WordPress that is used to run sites like WordPress.com.

WordPress MU 2.8.3 is a security and bugfix release based on the fixes in WordPress 2.8.3 but also contains many other changes.

It’s a required upgrade for security reasons but also fixes a number of annoying bugs, especially #1067 and #1076.

Unfortunately the automatic upgrader in MU 2.8.2 is broken but it’s simple to fix:

  • Before upgrading, edit wp-admin/includes/class-wp-upgrader.php and look for line 697.

    if ( !$wp_filesystem->copy($working_dir . ‘/wordpress/wp-admin/includes/update-core.php’, $wp_dir . ‘wp-admin/includes/update-core.php’, true) ) {

  • See the “/wordpress/wp-admin/includes” bit? Change that to “/wordpress-mu/wp-admin/includes”:

    if ( !$wp_filesystem->copy($working_dir . ‘/wordpress-mu/wp-admin/includes/update-core.php’, $wp_dir . ‘wp-admin/includes/update-core.php’, true) ) {

  • Save the file and auto upgrade. I upgraded this afternoon without a hitch after making that change. It’s fixed in 2.8.3 so it’s the last time you’ll have to do it.

Do not copy and paste the line above as WordPress will have changed the quotes to “smart quotes”. Actually go in and type “-mu” after “wordpress”. No copy and pasting please!

If auto upgrading still doesn’t work, don’t sweat it. Download the new release from the download page and upgrade manually, overwriting your current install with the new files.

39 thoughts on “WordPress MU 2.8.3

  1. Thank you, sir! That promptly ended my hour long mission trying to figure out it kept failing. 🙂

  2. little reminder to all code pasters: always remember to check code snippets you are pasting from a website into an editor for tick marks, inverted commas, single quotation marks – because ’ is not ‘ , even when it looks like it on this page.
    besides that: the update went through fine, so i must acknowledge that this was a really big mu-ing step!

  3. I don’t want to end up with the latest commit on 2.8, I just want releases. Does stuff get commited to the branches in between releases?

  4. Ok, it looks like 2.8.3 is revision 1929 in trac, and looks like the branch isn’t updated yet… so I guess I’ll do that. But I’ll have to remember not to do any updates until the next release.

  5. Hi,

    thanks for the workaround. I just tried it, but I got a warning message saying, that I am trying to download the en-us-Version which doesn’t match with my language version.

    So what to do?

    Kind Regards

  6. Sorry for the newbie question, but I would not see this problem if I was upgrading directly from a version prior to 2.8.2 would I? I am still running 2.7.1

    Also, is 2.8.4 expected soon? If so, I might just wait a bit and upgrade directly to that.


  7. Pingback: WordPress MU 2.8.4

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