I have just installed
When I go to the Settings --> WP Super Cache Manager page, I get:
"Permlink Structure Error
A custom url or permalink structure is required for this plugin to work correctly. Please go to the Permalinks Options Page to configure your permalinks."
Were can I get information on creating a suitable "A custom url or permalink structure"?
I got 2 hits when searching the forum, but neither shed any light on this.