I tried with 0.6 and 0.7 of the W3 Total Cache plugin. Both times I get this error:
Plugin could not be activated because it triggered a fatal error.
Parse error: syntax error, unexpected '=', expecting ')' in /path/to/blog/wp-content/plugins/w3-total-cache/lib/W3/Plugin/Cdn.php on line 478
I set the access rights of wp-content to 777, copied the plugin folder to the plugin folder and tried to activate it in the wordpress plugin section.
I'm running php version 4.4.9.
Anyone any ideas?