I have been working on a plugin for Jupiter Three that uses shortcodes to create a custom Amazon post featuring a single Book based on ASIN. What I have run into is issues with debugging - how do I create simple debug output so I can see if my code is running correctly? I get errors from Mysql using wpdb but not clear on what the errors are. The interesting thing about the DB errors is that my inserts still go in, but a drop table won't drop. I have posts in the forums. Hope to hear something soon. I am stuck.