I'm using a few plugins and UpThemes framework on my new website and if I turn on Wp Debug I can see that there are a few errors related to Deprecated functions (but website is working). What I would like to know is if there is a plugin, a software or a pray (lol) that I can use to know exactly where the deprecated code is so I'll be able to use the new one.
Which is the plugin/software that you use to debug your plugins, themes?
define('WP_DEBUG', true);
inwp-config.php
(located in your wordpress installation's root folder) tells you the file and the line of every warning.