WordPress Update Fail

Automatic updating of WordPress has been failing (plugin updating is fine) on blogs installed in sub-directories:

Downloading update from http://wordpress.org/wordpress-3.3.1-partial-0.zip…

Unpacking the update…

Could not copy files.

Installation Failed

Things tried:

  • removing the .htaccess file
  • deleting the updates area
  • repermissioning files
  • adding various blocks of code to config and htaccess
  • verified our FTP server was the ‘correct’ one.
  • tried localhost, direct IP address, host name and a dozen others.

This sort of thing has happened before, and we’re unsure if it’s a server issue or WordPress one.  Automatic install of new sites using cPanel works (with current version – 3.3.1).