A word of caution to those moving their blogs from one installation to another: if you’ve got some posts in your blog “secured” with a password for reading – they may be no longer secure after importing into a new WordPress.
Protected Posts DO NOT preserve their protection on WordPress export/import.
The password field becomes cleared on such entries somehow (not included in export – special XML, WordPress eXtended RSS or WXR – in the first place?).
Beware of Google indexing your protected posts while you tinker about re-closing them down.