Got Problems When You Upgrade WordPress to Version 2.8? - 10% OFF
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WordPress 2.8 had been released on 10 June 2009, offering hundreds of bug fix, better speed, a new widgets page, a file editor (plugin & theme editor) with the syntax highlighter, shortcuts to documentation pages of each WordPress function that in used on the file and more.
From some sites that I have been upgraded, the upgrade process in general running smoothly without a hitch of any kind, except for few of them. The problems that arise are not the same, below is several of them.
1. After the upgrade process is finished, we only got a message “Briefly unavailable for Scheduled maintenance. Check back in a minute”.
When we perform the WordPress automatic upgrade, its engine add a file called “. maintenance” in the root folder. When the upgrade is complete, WordPress will delete this file. However, when the upgrade process is not running correctly, it left behind there.
The solution is, we have to delete the “.maintenance” file. Assuming the upgrade process did not run smoothly, we may be forced to repeat the upgrade process again.
Read also the article from wp-hackr for additional reference.
2. Blank / White Screen of Death. Clean white page found both in the front page and on the admin page after upgrade, or sometimes only when we try to go to the admin page.
Usually this problem occurs when there are plugins that are not compatible with WordPress 2.8, therefore it is highly recommended to deactivate all plugins before upgrading our WordPress blog.
To overcome this, try to rename the plugins folder into plugins-old or whatever, and create a new empty folder named plugins. After we can go to the Admin page, try to move each plugin from the plugins-old folder to the new plugins folder.
Each time we move a plugin, check whether we can still access the Admin page or not. If we can, the plugin is does not problematic with WordPress 2.8, while if otherwise, then we can not use that plugin in the WordPress 2.8.
In my case, I found that Adsense Integrator plugin is the one that raise the problem.
As a comparison, see page Plugins for WordPress 2.8 Compatibility, especially the “Conflicting WordPress Plugins” and “Non-working WordPress Plugins, or Has Issues”.
Michael from hightechdad had found another two possible ways to solve this problem, check it here.
3. “Fatal error: Call to undefined function is_site_admin () in /home/namadomain/public_html/wp-content/plugins/nofollow-links-in-posts/nofollow-links-in-posts.php on line 148″.
From the error message we know that there is a function that most probably not become compatible with WordPress 2.8. The solution is simple, just delete or rename the plugin folder, in above case, nofollow-links-in-posts folder.
4. “Warning: Can not modify header information – headers already sent by (output started at /home/username/public_html/wp-content/themes/inspiration/functions.php: 30) in /home/username/public_html/wp-includes/pluggable.php on line 865″.
This problem is very common, not only happening when we are upgrading WordPress. Occurred because we have an empty string / blank lines after the tag?> in the corresponding file.
Edit the file mentioned in the error message, in this example file functions.php from theme Inspiration, move the cursor right after the tag?> and press the delete button for some time, and save.
5. The Visual Editor disappears!
From googling, this problem is very often happens every time we upgrade WordPress.
Solutions that are required also varied. Sometime it’s enough with just refreshing the site with CTRL + F5 (reload page with clear cache). Some simply unticking the option ” Disable the visual editor when writing” on the user profile page. But in my case, the problem was solved only after I re-upload all files in folder wp-includes.
6. The active theme was changed to the previous theme, not the theme we used before upgrading WordPress.
Easily fixed by activating the correct theme.
7. The entire contents of the post disappears when switching from HTML to Visual editor.
Unfortunately until now I have not found a solution for this yet, even while writing this article I had to restore my post to the previous revision after I switch tab from HTML to Visual editor.
I found a new thread about this problem at WordPress.org forum, but no solution yet.
Waw, that’s a lot of problems there, make me reconsidering whether moving to version 2.8 is right or not? Maybe I should have wait for version 2.8.1.
Anyway, to minimize the possibility of errors in the process of upgrading WordPress, try to backup the database before upgrading the blog using plugin wp-db backup plugin or other similar plugins, and turn off all plugins. Good luck.
Update: A sticky post about WordPress 2.8 problems and solutions is already available on WordPress.org forum.
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I was experiencing the white screen of death, and the tip in this article was golden. Thank you so much, as I would have never thought to re-name the plugins folder.
Glad to hear that Lindsay.
Once I got problem while upgrading to WP 2.8. I hope the next WP version will be released without any bugs. Can I downgrade to WP 2.7 from WP 2.8?
Thanks
Hi Duriat, we can downgrade by manually re-upload via ftp all files of WP2.7 overwriting all files of WP 2.8 currently on the server. Please be sure to backup your database first.
Wow.. great, many thank for you, Poer. Salam sukses wae lah..hehehe..
Hi,
For issue 1. After the upgrade process is finished, we only got a message “Briefly unavailable for Scheduled maintenance. Check back in a minute”. The .maintanence file was never written in my root. I looked everywhere and could not find it.
I ended up looking in the the wp-settings.php and found the HTML written in there which I deleted and now have access to my site again. When I logged back in this message was displyed at the top:
“An automated WordPress update has failed to complete – please attempt the update again now.”
Just thought I would let the world know incase someone was faced with the same problem!