I'm currently using the standard permalink structure.
I want to use the WP Super Cache plugin to the best of it's ability and it requires a switch to Fancy Permalinks.
Is this going to cause problems with my old posts?
Also, it says:
You should have mod mime, mod rewrite and fancy permalinks enabled. PHP safe mode should be disabled. If any of those are missing or off you can still use the slower WP-Cache part of the plugin.
Where are the mod mime, mod rewrite and PHP safe mode check boxes?