Jonathan,
I've received the below for the blocked process:
<inputbuf>
Proc [Database Id = 14 Object Id = 1311948665] </inputbuf>
</process>
This is a stored procedure that doesn't touch the table that was being blocked. Could this indicate that: the blocked process report only shows the last executed query of a multi-query batch or transaction?
How else can a table be blocked by a SP that has nothing to do with it?