[Plugin: WP Super Cache] Unable to edit/save/delete posts since installing Super Cache

Anything in your PHP error log? (Before you ask, No, I don’t know where that file is on your system)

Thanks for the quick reply – I’ve done some troubleshooting and the problem is to do with the .htaccess file in the root directory of my blog. I disabled all my plugins and deleted the .htaccess file from the server and I could then edit & save posts – once I reactivated all the plugins including Super Cache, the error re-asserted itself.

The code in my .htaccess is:

# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /myblogname/
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /myblogname/index.php [L]
</IfModule>
# END WordPress

# BEGIN WPSuperCache
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /myblogname/
AddDefaultCharset UTF-8
RewriteCond %{REQUEST_URI} !^.*[^/]$
RewriteCond %{REQUEST_URI} !^.*//.*$
RewriteCond %{REQUEST_METHOD} !=POST
RewriteCond %{QUERY_STRING} !.*=.*
RewriteCond %{HTTP:Cookie} !^.*(comment_author_|wordpress|wp-postpass_).*$
RewriteCond %{HTTP:Accept-Encoding} gzip
RewriteCond %{DOCUMENT_ROOT}/wp-content/cache/supercache/%{HTTP_HOST}/myblogname/$1/index.html.gz -f
RewriteRule ^(.*) /wp-content/cache/supercache/%{HTTP_HOST}/myblogname/$1/index.html.gz [L]

RewriteCond %{REQUEST_URI} !^.*[^/]$
RewriteCond %{REQUEST_URI} !^.*//.*$
RewriteCond %{REQUEST_METHOD} !=POST
RewriteCond %{QUERY_STRING} !.*=.*
RewriteCond %{HTTP:Cookie} !^.*(comment_author_|wordpress|wp-postpass_).*$
RewriteCond %{DOCUMENT_ROOT}/wp-content/cache/supercache/%{HTTP_HOST}/myblogname/$1/index.html -f
RewriteRule ^(.*) /wp-content/cache/supercache/%{HTTP_HOST}/myblogname/$1/index.html [L]
</IfModule>
# END WPSuperCache

I will have a look for my php log and see if anything is in it.

I have loads of the error below in my logs – is it relevant?

PHP Warning:  Unknown(): Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/home/users/web/bxxxx/sl.tiptopmu/public_html/cgi-bin/tmp) in Unknown on line 0
PHP Warning:  Unknown(): open(/home/users/web/bxxxx/sl.tiptopmu/public_html/cgi-bin/tmp/sess_769531b78a99fe9644f0d12ed1a5aaf2, O_RDWR) failed: No such file or directory (2) in Unknown on line 0

I also saw that my host is running PHP4 as a default rather than PHP5 but this is unrelated as WordPress runs fine on PHP4.1 or higher.

Actually that seems to be it – I can now save edits to posts so it must be related to my host running PHP4 as default rather than PHP5 – will do some more testing just to make sure, gotta couple of posts to finish and publish.