spiritzilla

Yeah, Thanks Mika, The typo error doesn’t appear like that on the site root. I copied it to a Word document for presentation before re-copying it here. Hence the merger.
Upgrade wouldn’t do that I guess.

I noticed initially that I could access the server from my house in contrast to what happen at work. even though the load time was extremely slow(could take about 5-10minutes).

I have since restored my site from a back up. All is well for now, but the problem remains unsolved as I haven’t got the confident to update my WordPress to 3.5 anymore without anticipating such problems I would just leave it for now.
Meanwhile if anyone has an idea, I am still following this issue because it was a real night mare for me and maybe for many other that could face this type of issue in future.

# BEGIN WordPress 

RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]  

# uploaded files
RewriteRule^([_0-9a-zA-Z-]+/)?files/(.+) wp-includes/ms-files.php?file=$2 [L] 

#add a trailing slash to /wp-admin
RewriteRule^([_0-9a-zA-Z-]+/)?wp-admin$ $1wp-admin/ [R=301,L]  

RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^ - [L] RewriteRule  ^[_0-9a-zA-Z-]+/(wp-content|admin|includes).*) $1 [L]
RewriteRule  ^[_0-9a-zA-Z-]+/(.*\.php)$ $1 [L]
RewriteRule .index.php [L]
php_valueupload_max_filesize 20M
php_valuepost_max_size 20M  

# END WordPress

I have just renamed the plugin and mu-folder folders to something else, hoping that i would be able to get to the admin page, but still couldn’t. The front page didnt function normally, so I reverted back the renamings to normal.
Still same problem. Bad Gateway. Even when I cleared the browser cache.

I got an idea which I need an advice on. I was thinking the problem might have arrived due to maybe one or two plugin not compatible with my upgrade.
1. Temporarily renaming the wp-content/plugins folder.(this automatically disables all the plugins).
2. then naming it back to the oringinals – I hope I should be able to log back into the admin if a plugin is causing the problem – meaning I can then be activating the plugins one by one and until I find the “culprit”

My fear is: The site is running perfectly in the front-end, Disabling plugins might hide many things. Should in case the problem isn’t solved,
How do restore the activated plugins? without adding to the problem?
Any advice Pls

I have the same problem, but that is when I tried to log in from the admin section /wp-admin I get a 502 Bad Gateway error. front part of the WordPress runs fine.