A faculty member is having difficulties with a instructional wordpress install. Fixing individual permission problems has been hit and miss, and have become a perennial pain, so I'll ask here. What can I do to make WP Just Work? The kinds of errors they get:
Installing Plugin: Lightbox 2 2.9.2 Downloading install package from http://downloads.wordpress.org/plugin/lightbox-126.96.36.199.zip… Unpacking the package… Could not create directory. /home/CIM140/public_html/wordpress/wp-content/upgrade/lightbox-2.tmp
When I su as www-data (the user apache runs as in Ubuntu), I can make that directory just fine. My test wp instance installs this plugin just fine, so I'm at a loss as to why it fails for them.