Just upgraded to 3.02 and the backend is broken, unless you change the settings and re-save.
So you will see the following errors ...
Under "Ignore Categories" many of these errors:
Warning: in_array() [function.in-array]: Wrong datatype for second argument in /home/mysite/public_html/wp-content/plugins/etruel-del-post-copies/WP-del_post_copies-options.php on line 18
And the Cron time will be set to 1970.
... until you change the Cron job settings, and save.
This is just a heads-up in case someone else runs into this.
BTW deactivating and re-activating the plugin does not automatically solve this.