As reported in FAQ I tried to access /feed/?post_type=liveblog_entry&liveblog=$ID , but it didn't worked. Instead, it shows the "normal" feed (every post). I tried to change the basic options about permalinks, but it didn't work.
Doing /feed/?post_type=page do what expected.
Same applies for /?post_type=liveblog_entry , etc.
Page /wp-admin/edit.php?post_type=liveblog_entry also do what expected.
